Don't optimize out color attribute in reduced shader mode in GrTextureOp

Bug: skia:11844
Change-Id: If59b0e13270939adb4b504001915c38122a19f0a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/401756
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed