Replace cool texture/sampler suffixes with boring ones.

Viewer can't handle the Unicode and displays ?.

Change-Id: I6356ae964b3d244052373729e7cb5b910794c3c2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/736157
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Arman Uguray <armansito@google.com>
13 files changed