Add test failures for skia font hinting.

Recent changes to skia caused pixels diffs throughout android. Until the final
fix lands, let's mark these tests as failing.

BUG=338475
TBR=bungeman@google.com

Review URL: https://codereview.chromium.org/131763009

git-svn-id: svn://svn.chromium.org/blink/trunk@165961 bbb929c8-8fbe-4397-9dbb-9b2b20218538