Ignore a flaky msaa4 GM and some perma-broken S4 GMs

The Ubuntu12 msaa4 image seems to flake randomly
The S4 images are covered by skia:3116 (Galaxy S4 exhibits some saveLayer bugs (both normal and with hoisting))

TBR=humper@google.com

Review URL: https://codereview.chromium.org/748773003
2 files changed