Add clone() to three more fragment processor classes

ColorMatrixEffect
NormalFlatFP
NormalMapFP

Change-Id: Iea3d103baff09808fd4c96685475d67f4fe75083
Reviewed-on: https://skia-review.googlesource.com/26420
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
5 files changed