[PATCH 1/2] maint: update gnulib to latest

Run 'make update-gnulib-to-latest', mainly to update the copyright
year numbers with:

  > maint: run 'make update-copyright'

* bootstrap: Sync from gnulib/build-aux/bootstrap.
* gnulib: Update to latest.
* tests/init.sh: Sync from 'gnulib/tests/init.sh'.
---
 bootstrap     | 2 +-
 gnulib        | 2 +-
 tests/init.sh | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/bootstrap b/bootstrap
index 63e76dee..96588618 100755
--- a/bootstrap
+++ b/bootstrap
@@ -4,7 +4,7 @@ scriptversion=2021-04-11.09; # UTC
 
 # Bootstrap this package from checked-out sources.
 
-# Copyright (C) 2003-2021 Free Software Foundation, Inc.
+# Copyright (C) 2003-2022 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
diff --git a/gnulib b/gnulib
index 5209414e..75541c6a 160000
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 5209414e95ed830b8b687ae71be8911ef0969e3e
+Subproject commit 75541c6adaf6fc45541a35d2c8803b9b68f2a7fc
diff --git a/tests/init.sh b/tests/init.sh
index a975592f..933fdd40 100755
--- a/tests/init.sh
+++ b/tests/init.sh
@@ -1,6 +1,6 @@
 # source this file; set up for tests
 
-# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# Copyright (C) 2009-2022 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
-- 
2.34.1