qemu: display: CVE-2016-9912

qemu: display: CVE-2016-9912

virtio-gpu: memory leakage when destroying gpu resource

Reference:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9912

Reference to upstream patch:
http://git.qemu-project.org/?p=qemu.git;a=patch;h=b8e23926c568f2e963af39028b71c472e3023793

(From OE-Core rev: 8bf7ade372b46b8a872661a7904fbaa30fa262a2)

Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>