[PATCH v2] test: correct strlcat license information

[Denis 'GNUtoo' Carikli]

The GPL-2.1 isn't a valid license.

The copyright header says that "These tests adapted from glibc's
string/test-strncat.c" and test-strncat.c is under the
LGPL-2.1-or-later.

This was reported to us by Leah Rowe.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo at cyberdimension.org>
---
ChangeLog v1->v2:
* Fixed the SPDX license identifier (LGPL-2.1+ like names are used
  Guix and I'm used to that, sorry for not spoting the issue).
  I've updated the commit message accordingly.
* Rebased on the 'next' branch.
---
 test/lib/strlcat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/lib/strlcat.c b/test/lib/strlcat.c
index d1a0293271b..dead1dfc70e 100644
--- a/test/lib/strlcat.c
+++ b/test/lib/strlcat.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.1+
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /*
  * Copyright (C) 2021 Sean Anderson <seanga2 at gmail.com>
  * Copyright (C) 2011-2021 Free Software Foundation, Inc.

base-commit: 42a4ff5f63baacc414b564c02541cd1f5c0862ee
-- 
2.51.2