ghostscript: Fix CVE-2021-3781

Backport a patch file from upstream, since doing an uprev of the recipe
to the version with the fix (9.55) would introduce functional changes.

CVE: CVE-2021-3781

Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>