glib: Whitelist CVE-2019-12450

Fixed in 2.60.4, but CPE data is outdated.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>