Make savelayer_* GM be 565 friendly

Change-Id: I0594d9e8d2495643a404bddee61d7f01c7c0103c
Reviewed-on: https://skia-review.googlesource.com/7263
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed