Bail out of test if MSAA surface creation fails

Bug: skia:
Change-Id: I44768314fad49fb0e094e30037a3fe159ebcbd0b
Reviewed-on: https://skia-review.googlesource.com/20044
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed