add gm/bench for runtime colorfilter

Change-Id: I236f729d6cf5812eff9ca75b055b827b3d782f9b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/210061
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
1 file changed