Add a new wacky_yuv GM that exercises cubic sampling.

We have no GM that tests cubic sampling with the YUV shaders.

Bug: b/311221424
Change-Id: Ib6db54b191a1734b8dcf00eb1c89a60721616001
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/787437
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
1 file changed