CVE-2015-4491 already fixed in the release so drop patch.
Fixes a heap overflow with a gif file and a heap overflow and DoS with a
tga file. CVEs not assigned yet.
Tests disabled since they fail to build properly on uClibc toolchains.
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
