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

6 files changed, 6 insertions, 6 deletions

diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c b/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c
index dd39ffa8c2..4133388b77 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c
@@ -1,5 +1,5 @@
 /* arch_prctl call for Linux/x32.
-   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_64/x32/dl-cache.h b/sysdeps/unix/sysv/linux/x86_64/x32/dl-cache.h
index 3605f917bd..c9f60b22ff 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/dl-cache.h
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/dl-cache.h
@@ -1,5 +1,5 @@
 /* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
-   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_64/x32/fixup-asm-unistd.h b/sysdeps/unix/sysv/linux/x86_64/x32/fixup-asm-unistd.h
index 01d1f448ca..1489fc9336 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/fixup-asm-unistd.h
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/fixup-asm-unistd.h
@@ -1,5 +1,5 @@
 /* Regularize <asm/unistd.h> definitions.  X32 version.
-   Copyright (C) 2020 Free Software Foundation, Inc.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/lseek.S b/sysdeps/unix/sysv/linux/x86_64/x32/lseek.S
index ca656ba12a..38d2ee39d7 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/lseek.S
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/lseek.S
@@ -1,5 +1,5 @@
 /* The lseek system call with 64-bit offset.  Linux/x32 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
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/x32/sysdep.h
index 62e6f8fe11..62c9737c6b 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/sysdep.h
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/sysdep.h
@@ -1,4 +1,4 @@
-/* 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_64/x32/times.c b/sysdeps/unix/sysv/linux/x86_64/x32/times.c
index 864c123117..aa0e01c300 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/times.c
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/times.c
@@ -1,5 +1,5 @@
 /* Linux times.  X32 version.
-   Copyright (C) 2015-2020 Free Software Foundation, Inc.
+   Copyright (C) 2015-2021 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