Update copyright dates with scripts/update-copyrights

I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master

12 files changed, 12 insertions, 12 deletions

diff --git a/sysdeps/unix/sysv/linux/x86/bits/environments.h b/sysdeps/unix/sysv/linux/x86/bits/environments.h
index eecee90..b90d9bc 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/environments.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/environments.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1999-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1999-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/epoll.h b/sysdeps/unix/sysv/linux/x86/bits/epoll.h
index 0b34b3d..acb2707 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/epoll.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/epoll.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/fcntl.h b/sysdeps/unix/sysv/linux/x86/bits/fcntl.h
index 5a90d9a..8cc6e95 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/fcntl.h
@@ -1,5 +1,5 @@
 /* O_*, F_*, FD_* bit values for Linux/x86.
-   Copyright (C) 2001-2020 Free Software Foundation, Inc.
+   Copyright (C) 2001-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/ipctypes.h b/sysdeps/unix/sysv/linux/x86/bits/ipctypes.h
index 12e4cd7..dc56d93 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/ipctypes.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/ipctypes.h
@@ -1,5 +1,5 @@
 /* bits/ipctypes.h -- Define some types used by SysV IPC/MSG/SHM.
-   Copyright (C) 2012-2020 Free Software Foundation, Inc.
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/mman.h b/sysdeps/unix/sysv/linux/x86/bits/mman.h
index 7f1c8f2..b2ae788 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/mman.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/mman.h
@@ -1,5 +1,5 @@
 /* Definitions for POSIX memory map interface.  Linux/x86_64 version.
-   Copyright (C) 2001-2020 Free Software Foundation, Inc.
+   Copyright (C) 2001-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/procfs-id.h b/sysdeps/unix/sysv/linux/x86/bits/procfs-id.h
index 6e52ca2..e9889d8 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/procfs-id.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/procfs-id.h
@@ -1,5 +1,5 @@
 /* Types of pr_uid and pr_gid in struct elf_prpsinfo.  x86 version.
-   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
 
    This file is part of the GNU C Library.
 
diff --git a/sysdeps/unix/sysv/linux/x86/bits/procfs.h b/sysdeps/unix/sysv/linux/x86/bits/procfs.h
index 2301230..963fd0c 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/procfs.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/procfs.h
@@ -1,5 +1,5 @@
 /* Types for registers for sys/procfs.h.  x86 version.
-   Copyright (C) 2001-2020 Free Software Foundation, Inc.
+   Copyright (C) 2001-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/sigcontext.h b/sysdeps/unix/sysv/linux/x86/bits/sigcontext.h
index 17015a2..1fb6ca2 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/sigcontext.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/sigcontext.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/struct_stat.h b/sysdeps/unix/sysv/linux/x86/bits/struct_stat.h
index dae7aa4..6ddd01d 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/struct_stat.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/struct_stat.h
@@ -1,5 +1,5 @@
 /* Definition for struct stat.
-   Copyright (C) 2020 Free Software Foundation, Inc.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/timesize.h b/sysdeps/unix/sysv/linux/x86/bits/timesize.h
index 2cd0720..17e943a 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/timesize.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/timesize.h
@@ -1,5 +1,5 @@
 /* Bit size of the time_t type at glibc build time, x86-64 and x32 case.
-   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/types/struct_semid_ds.h b/sysdeps/unix/sysv/linux/x86/bits/types/struct_semid_ds.h
index c3f2fde..90f03b2 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/types/struct_semid_ds.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/types/struct_semid_ds.h
@@ -1,5 +1,5 @@
 /* x86 implementation of the semaphore struct semid_ds.
-   Copyright (C) 1995-2020 Free Software Foundation, Inc.
+   Copyright (C) 1995-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/unix/sysv/linux/x86/bits/typesizes.h b/sysdeps/unix/sysv/linux/x86/bits/typesizes.h
index 1bb4a16..060af05 100644
--- a/sysdeps/unix/sysv/linux/x86/bits/typesizes.h
+++ b/sysdeps/unix/sysv/linux/x86/bits/typesizes.h
@@ -1,5 +1,5 @@
 /* bits/typesizes.h -- underlying types for *_t.  Linux/x86-64 version.
-   Copyright (C) 2012-2020 Free Software Foundation, Inc.
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or