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 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines

5 files changed, 5 insertions, 5 deletions

diff --git a/sysdeps/unix/sysv/linux/riscv/bits/environments.h b/sysdeps/unix/sysv/linux/riscv/bits/environments.h
index a10e407230..f515490f06 100644
--- a/sysdeps/unix/sysv/linux/riscv/bits/environments.h
+++ b/sysdeps/unix/sysv/linux/riscv/bits/environments.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2020-2021 Free Software Foundation, Inc.
+/* Copyright (C) 2020-2022 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/riscv/bits/fcntl.h b/sysdeps/unix/sysv/linux/riscv/bits/fcntl.h
index 51c6dfbcad..55867b8e18 100644
--- a/sysdeps/unix/sysv/linux/riscv/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/riscv/bits/fcntl.h
@@ -1,5 +1,5 @@
 /* O_*, F_*, FD_* bit values for Linux / RISC-V.
-   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Copyright (C) 2011-2022 Free Software Foundation, Inc.
 
    This file is part of the GNU C Library.
 
diff --git a/sysdeps/unix/sysv/linux/riscv/bits/procfs.h b/sysdeps/unix/sysv/linux/riscv/bits/procfs.h
index 487d0f08a6..a9612e2127 100644
--- a/sysdeps/unix/sysv/linux/riscv/bits/procfs.h
+++ b/sysdeps/unix/sysv/linux/riscv/bits/procfs.h
@@ -1,5 +1,5 @@
 /* Types for registers for sys/procfs.h.  RISC-V version.
-   Copyright (C) 1996-2021 Free Software Foundation, Inc.
+   Copyright (C) 1996-2022 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/riscv/bits/sigcontext.h b/sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h
index 14e4e06fac..b6e15b5f62 100644
--- a/sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h
+++ b/sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h
@@ -1,5 +1,5 @@
 /* Machine-dependent signal context structure for Linux.  RISC-V version.
-   Copyright (C) 1996-2021 Free Software Foundation, Inc.  This file is part of the GNU C Library.
+   Copyright (C) 1996-2022 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
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/unix/sysv/linux/riscv/bits/time64.h b/sysdeps/unix/sysv/linux/riscv/bits/time64.h
index e2336a9543..76e921919d 100644
--- a/sysdeps/unix/sysv/linux/riscv/bits/time64.h
+++ b/sysdeps/unix/sysv/linux/riscv/bits/time64.h
@@ -1,5 +1,5 @@
 /* bits/time64.h -- underlying types for __time64_t.  RISC-V version.
-   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+   Copyright (C) 2020-2022 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