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

8 files changed, 8 insertions, 8 deletions

diff --git a/misc/bits/err-ldbl.h b/misc/bits/err-ldbl.h
index fa2e61fea4..330e7dd11a 100644
--- a/misc/bits/err-ldbl.h
+++ b/misc/bits/err-ldbl.h
@@ -1,5 +1,5 @@
 /* Redirections for err.h functions for -mlong-double-64.
-   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   Copyright (C) 2019-2021 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/misc/bits/error-ldbl.h b/misc/bits/error-ldbl.h
index e92943dd92..da46f7cc11 100644
--- a/misc/bits/error-ldbl.h
+++ b/misc/bits/error-ldbl.h
@@ -1,5 +1,5 @@
 /* Redirections for error.h functions for -mlong-double-64.
-   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   Copyright (C) 2019-2021 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/misc/bits/error.h b/misc/bits/error.h
index f48b8d7480..14735eb89d 100644
--- a/misc/bits/error.h
+++ b/misc/bits/error.h
@@ -1,5 +1,5 @@
 /* Specializations for error functions.
-   Copyright (C) 2007-2020 Free Software Foundation, Inc.
+   Copyright (C) 2007-2021 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/misc/bits/select2.h b/misc/bits/select2.h
index 7e17430ed9..a6dfe68538 100644
--- a/misc/bits/select2.h
+++ b/misc/bits/select2.h
@@ -1,5 +1,5 @@
 /* Checking macros for select functions.
-   Copyright (C) 2011-2020 Free Software Foundation, Inc.
+   Copyright (C) 2011-2021 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/misc/bits/stab.def b/misc/bits/stab.def
index 49eecd5e3f..5c72900bd6 100644
--- a/misc/bits/stab.def
+++ b/misc/bits/stab.def
@@ -1,5 +1,5 @@
 /* Table of DBX symbol codes for the GNU system.
-   Copyright (C) 1988, 1997-2020 Free Software Foundation, Inc.
+   Copyright (C) 1988, 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/misc/bits/syslog-ldbl.h b/misc/bits/syslog-ldbl.h
index 657b192b9b..b6fbb08406 100644
--- a/misc/bits/syslog-ldbl.h
+++ b/misc/bits/syslog-ldbl.h
@@ -1,5 +1,5 @@
 /* -mlong-double-64 compatibility mode for syslog functions.
-   Copyright (C) 2006-2020 Free Software Foundation, Inc.
+   Copyright (C) 2006-2021 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/misc/bits/syslog.h b/misc/bits/syslog.h
index 322192df21..6f3137a98e 100644
--- a/misc/bits/syslog.h
+++ b/misc/bits/syslog.h
@@ -1,5 +1,5 @@
 /* Checking macros for syslog functions.
-   Copyright (C) 2005-2020 Free Software Foundation, Inc.
+   Copyright (C) 2005-2021 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/misc/bits/types/struct_iovec.h b/misc/bits/types/struct_iovec.h
index 793258b481..89a87b7453 100644
--- a/misc/bits/types/struct_iovec.h
+++ b/misc/bits/types/struct_iovec.h
@@ -1,5 +1,5 @@
 /* Define struct iovec.
-   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