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/sysdeps/powerpc/bits/fenv.h b/sysdeps/powerpc/bits/fenv.h
index e5da962..67a1383 100644
--- a/sysdeps/powerpc/bits/fenv.h
+++ b/sysdeps/powerpc/bits/fenv.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2022 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/sysdeps/powerpc/bits/floatn.h b/sysdeps/powerpc/bits/floatn.h
index fab164e..23db8be 100644
--- a/sysdeps/powerpc/bits/floatn.h
+++ b/sysdeps/powerpc/bits/floatn.h
@@ -1,5 +1,5 @@
 /* Macros to control TS 18661-3 glibc features on powerpc.
-   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+   Copyright (C) 2017-2022 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/sysdeps/powerpc/bits/fp-fast.h b/sysdeps/powerpc/bits/fp-fast.h
index 44087ae..d87cf2c 100644
--- a/sysdeps/powerpc/bits/fp-fast.h
+++ b/sysdeps/powerpc/bits/fp-fast.h
@@ -1,5 +1,5 @@
 /* Define FP_FAST_* macros.  PowerPC version.
-   Copyright (C) 2016-2021 Free Software Foundation, Inc.
+   Copyright (C) 2016-2022 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/sysdeps/powerpc/bits/hwcap.h b/sysdeps/powerpc/bits/hwcap.h
index 17aa48f..2b9b23a 100644
--- a/sysdeps/powerpc/bits/hwcap.h
+++ b/sysdeps/powerpc/bits/hwcap.h
@@ -1,5 +1,5 @@
 /* Defines for bits in AT_HWCAP and AT_HWCAP2.
-   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/sysdeps/powerpc/bits/link.h b/sysdeps/powerpc/bits/link.h
index 1b96edd..ce4011c 100644
--- a/sysdeps/powerpc/bits/link.h
+++ b/sysdeps/powerpc/bits/link.h
@@ -1,5 +1,5 @@
 /* Machine-specific declarations for dynamic linker interface.  PowerPC version
-   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+   Copyright (C) 2004-2022 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/sysdeps/powerpc/bits/setjmp.h b/sysdeps/powerpc/bits/setjmp.h
index c738ae9..81dc0ca 100644
--- a/sysdeps/powerpc/bits/setjmp.h
+++ b/sysdeps/powerpc/bits/setjmp.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2022 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