Release notes:
https://download.gnome.org/sources/libxslt/1.1/libxslt-1.1.43.news
Fixes CVE-2025-24855 & CVE-2024-55549.
Switched _LICENSE_FILES to Copyright due to upstream commit
https://gitlab.gnome.org/GNOME/libxslt/-/commit/29938a64f6449aceb3e97a9e8da10abe2e27a314
in version 1.1.36 and the removal of COPYING in the 1.1.43 tarball,
although COPYING did still exist in the 1.1.42 tarball.
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 50954cc5e0)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>