Snippets for libgcrypt 1.12.3 from Fedora ppc64le

Sourced from https://kojipkgs.fedoraproject.org/packages/libgcrypt/1.12.3/1.fc46/data/logs/ppc64le/build.log.

• testdrv.c:533:15: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
    533 |   arg_list[0] = strrchr (pgmname, '/');
        |               ^