add test for mac aa on fonts

Bug: skia:
Change-Id: I93b18ee84345e27eb5cf3a94feccb35391ac0e71
Reviewed-on: https://skia-review.googlesource.com/c/193661
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
2 files changed