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/sysdeps/s390/multiarch/8bit-generic.c b/sysdeps/s390/multiarch/8bit-generic.c
index 642235d306..94359033c4 100644
--- a/sysdeps/s390/multiarch/8bit-generic.c
+++ b/sysdeps/s390/multiarch/8bit-generic.c
@@ -1,5 +1,5 @@
 /* Generic conversion to and from 8bit charsets - S390 version.
-   Copyright (C) 2016-2020 Free Software Foundation, Inc.
+   Copyright (C) 2016-2021 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/s390/multiarch/gconv_simple.c b/sysdeps/s390/multiarch/gconv_simple.c
index a35d4b2f87..8ba664d30e 100644
--- a/sysdeps/s390/multiarch/gconv_simple.c
+++ b/sysdeps/s390/multiarch/gconv_simple.c
@@ -1,5 +1,5 @@
 /* Simple transformations functions - s390 version.
-   Copyright (C) 2016-2020 Free Software Foundation, Inc.
+   Copyright (C) 2016-2021 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/s390/multiarch/iconv/skeleton.c b/sysdeps/s390/multiarch/iconv/skeleton.c
index 27e4376c8f..1880ec4949 100644
--- a/sysdeps/s390/multiarch/iconv/skeleton.c
+++ b/sysdeps/s390/multiarch/iconv/skeleton.c
@@ -1,5 +1,5 @@
 /* Skeleton for a conversion module - S390 version.
-   Copyright (C) 2016-2020 Free Software Foundation, Inc.
+   Copyright (C) 2016-2021 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/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index e6195c6e26..4b170e4459 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -1,5 +1,5 @@
 /* Enumerate available IFUNC implementations of a function. s390/s390x 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
diff --git a/sysdeps/s390/multiarch/ifunc-resolve.h b/sysdeps/s390/multiarch/ifunc-resolve.h
index a4132ea6ef..4e50f2b225 100644
--- a/sysdeps/s390/multiarch/ifunc-resolve.h
+++ b/sysdeps/s390/multiarch/ifunc-resolve.h
@@ -1,6 +1,6 @@
 /* IFUNC resolver function for CPU specific functions.
    32/64 bit S/390 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
diff --git a/sysdeps/s390/multiarch/utf16-utf32-z9.c b/sysdeps/s390/multiarch/utf16-utf32-z9.c
index a9d9c6f825..881c0a57f9 100644
--- a/sysdeps/s390/multiarch/utf16-utf32-z9.c
+++ b/sysdeps/s390/multiarch/utf16-utf32-z9.c
@@ -1,6 +1,6 @@
 /* Conversion between UTF-16 and UTF-32 BE/internal - multiarch s390 version.
 
-   Copyright (C) 2017-2020 Free Software Foundation, Inc.
+   Copyright (C) 2017-2021 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/s390/multiarch/utf8-utf16-z9.c b/sysdeps/s390/multiarch/utf8-utf16-z9.c
index a31f1ab97f..2682bcaef3 100644
--- a/sysdeps/s390/multiarch/utf8-utf16-z9.c
+++ b/sysdeps/s390/multiarch/utf8-utf16-z9.c
@@ -1,6 +1,6 @@
 /* Conversion between UTF-8 and UTF-16 - multiarch s390 version.
 
-   Copyright (C) 2017-2020 Free Software Foundation, Inc.
+   Copyright (C) 2017-2021 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/s390/multiarch/utf8-utf32-z9.c b/sysdeps/s390/multiarch/utf8-utf32-z9.c
index a672895c14..931803463d 100644
--- a/sysdeps/s390/multiarch/utf8-utf32-z9.c
+++ b/sysdeps/s390/multiarch/utf8-utf32-z9.c
@@ -1,6 +1,6 @@
 /* Conversion between UTF-8 and UTF-32 - multiarch s390 version.
 
-   Copyright (C) 2017-2020 Free Software Foundation, Inc.
+   Copyright (C) 2017-2021 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