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

9 files changed, 9 insertions, 9 deletions

diff --git a/sysdeps/powerpc/nptl/Makefile b/sysdeps/powerpc/nptl/Makefile
index 7869dd571c..d99cfd5b34 100644
--- a/sysdeps/powerpc/nptl/Makefile
+++ b/sysdeps/powerpc/nptl/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 2003-2020 Free Software Foundation, Inc.
+# Copyright (C) 2003-2021 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/powerpc/nptl/bits/struct_mutex.h b/sysdeps/powerpc/nptl/bits/struct_mutex.h
index 7575bc577d..b32458870a 100644
--- a/sysdeps/powerpc/nptl/bits/struct_mutex.h
+++ b/sysdeps/powerpc/nptl/bits/struct_mutex.h
@@ -1,5 +1,5 @@
 /* PowerPC internal mutex struct definitions.
-   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/sysdeps/powerpc/nptl/bits/struct_rwlock.h b/sysdeps/powerpc/nptl/bits/struct_rwlock.h
index b07a57c0c4..2655364b75 100644
--- a/sysdeps/powerpc/nptl/bits/struct_rwlock.h
+++ b/sysdeps/powerpc/nptl/bits/struct_rwlock.h
@@ -1,5 +1,5 @@
 /* PowerPC internal rwlock struct definitions.
-   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.
 
diff --git a/sysdeps/powerpc/nptl/elide.h b/sysdeps/powerpc/nptl/elide.h
index 494e64669b..33327557a2 100644
--- a/sysdeps/powerpc/nptl/elide.h
+++ b/sysdeps/powerpc/nptl/elide.h
@@ -1,5 +1,5 @@
 /* elide.h: Generic lock elision support for powerpc.
-   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
diff --git a/sysdeps/powerpc/nptl/pthread_spin_lock.c b/sysdeps/powerpc/nptl/pthread_spin_lock.c
index cb729cf3c9..28bb538d46 100644
--- a/sysdeps/powerpc/nptl/pthread_spin_lock.c
+++ b/sysdeps/powerpc/nptl/pthread_spin_lock.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
 
diff --git a/sysdeps/powerpc/nptl/pthread_spin_trylock.c b/sysdeps/powerpc/nptl/pthread_spin_trylock.c
index 6fb0d7e915..34faec1a13 100644
--- a/sysdeps/powerpc/nptl/pthread_spin_trylock.c
+++ b/sysdeps/powerpc/nptl/pthread_spin_trylock.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
 
diff --git a/sysdeps/powerpc/nptl/pthread_spin_unlock.c b/sysdeps/powerpc/nptl/pthread_spin_unlock.c
index 4fa5a63df9..fcea37baf1 100644
--- a/sysdeps/powerpc/nptl/pthread_spin_unlock.c
+++ b/sysdeps/powerpc/nptl/pthread_spin_unlock.c
@@ -1,5 +1,5 @@
 /* pthread_spin_unlock -- unlock a spin lock.  PowerPC version.
-   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/sysdeps/powerpc/nptl/pthreaddef.h b/sysdeps/powerpc/nptl/pthreaddef.h
index 70e55b70f0..ef5310e631 100644
--- a/sysdeps/powerpc/nptl/pthreaddef.h
+++ b/sysdeps/powerpc/nptl/pthreaddef.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+/* Copyright (C) 2003-2021 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/powerpc/nptl/tls.h b/sysdeps/powerpc/nptl/tls.h
index d585968d04..6c779b6609 100644
--- a/sysdeps/powerpc/nptl/tls.h
+++ b/sysdeps/powerpc/nptl/tls.h
@@ -1,5 +1,5 @@
 /* Definition for thread-local data handling.  NPTL/PowerPC version.
-   Copyright (C) 2003-2020 Free Software Foundation, Inc.
+   Copyright (C) 2003-2021 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