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/m68k/bits/fcntl.h b/sysdeps/unix/sysv/linux/m68k/bits/fcntl.h
index b1bdbc2c3f..7bd7d81e5e 100644
--- a/sysdeps/unix/sysv/linux/m68k/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/m68k/bits/fcntl.h
@@ -1,5 +1,5 @@
 /* O_*, F_*, FD_* bit values for Linux.
-   Copyright (C) 2000-2020 Free Software Foundation, Inc.
+   Copyright (C) 2000-2021 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/m68k/bits/poll.h b/sysdeps/unix/sysv/linux/m68k/bits/poll.h
index 8384efbbad..2ffb0054c7 100644
--- a/sysdeps/unix/sysv/linux/m68k/bits/poll.h
+++ b/sysdeps/unix/sysv/linux/m68k/bits/poll.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2021 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/m68k/bits/procfs-id.h b/sysdeps/unix/sysv/linux/m68k/bits/procfs-id.h
index efba8f8575..3d9d376a0c 100644
--- a/sysdeps/unix/sysv/linux/m68k/bits/procfs-id.h
+++ b/sysdeps/unix/sysv/linux/m68k/bits/procfs-id.h
@@ -1,5 +1,5 @@
 /* Types of pr_uid and pr_gid in struct elf_prpsinfo.  M68K 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/m68k/bits/procfs.h b/sysdeps/unix/sysv/linux/m68k/bits/procfs.h
index d0c06a14f3..53ced74c55 100644
--- a/sysdeps/unix/sysv/linux/m68k/bits/procfs.h
+++ b/sysdeps/unix/sysv/linux/m68k/bits/procfs.h
@@ -1,5 +1,5 @@
 /* Types for registers for sys/procfs.h.  M68K version.
-   Copyright (C) 1996-2020 Free Software Foundation, Inc.
+   Copyright (C) 1996-2021 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/m68k/bits/sockaddr.h b/sysdeps/unix/sysv/linux/m68k/bits/sockaddr.h
index ecf654a075..e87b3a2b70 100644
--- a/sysdeps/unix/sysv/linux/m68k/bits/sockaddr.h
+++ b/sysdeps/unix/sysv/linux/m68k/bits/sockaddr.h
@@ -1,5 +1,5 @@
 /* Definition of struct sockaddr_* members and sizes, Linux/m68k version.
-   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/m68k/bits/struct_stat.h b/sysdeps/unix/sysv/linux/m68k/bits/struct_stat.h
index bf457a0db7..4ae7506eb5 100644
--- a/sysdeps/unix/sysv/linux/m68k/bits/struct_stat.h
+++ b/sysdeps/unix/sysv/linux/m68k/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