Disable optimizations GM for 565 targets.

BUG=skia:1994
R=robertphillips@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/129373002

git-svn-id: http://skia.googlecode.com/svn/trunk@12991 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed