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 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines

6 files changed, 6 insertions, 6 deletions

diff --git a/io/bits/fcntl2.h b/io/bits/fcntl2.h
index 2af7c83..52cfde5 100644
--- a/io/bits/fcntl2.h
+++ b/io/bits/fcntl2.h
@@ -1,5 +1,5 @@
 /* Checking macros for fcntl functions.
-   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+   Copyright (C) 2007-2022 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/io/bits/poll2.h b/io/bits/poll2.h
index 91cdcaf..3679d84 100644
--- a/io/bits/poll2.h
+++ b/io/bits/poll2.h
@@ -1,5 +1,5 @@
 /* Checking macros for poll functions.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+   Copyright (C) 2012-2022 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/io/bits/statx-generic.h b/io/bits/statx-generic.h
index f8b0f4d..78ff902 100644
--- a/io/bits/statx-generic.h
+++ b/io/bits/statx-generic.h
@@ -1,5 +1,5 @@
 /* Generic statx-related definitions and declarations.
-   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+   Copyright (C) 2018-2022 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/io/bits/statx.h b/io/bits/statx.h
index ed2ac92..406b11d 100644
--- a/io/bits/statx.h
+++ b/io/bits/statx.h
@@ -1,5 +1,5 @@
 /* statx-related definitions and declarations.  Generic version.
-   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+   Copyright (C) 2018-2022 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/io/bits/types/struct_statx.h b/io/bits/types/struct_statx.h
index 44153a8..45817cd 100644
--- a/io/bits/types/struct_statx.h
+++ b/io/bits/types/struct_statx.h
@@ -1,5 +1,5 @@
 /* Definition of the generic version of struct statx.
-   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+   Copyright (C) 2018-2022 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/io/bits/types/struct_statx_timestamp.h b/io/bits/types/struct_statx_timestamp.h
index 360d46c..bbd403d 100644
--- a/io/bits/types/struct_statx_timestamp.h
+++ b/io/bits/types/struct_statx_timestamp.h
@@ -1,5 +1,5 @@
 /* Definition of the generic version of struct statx_timestamp.
-   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+   Copyright (C) 2018-2022 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