Temporarily disable etc1 GM on Google3 Bug: skia:8684 Change-Id: I78aa90af2d643656532e082c4c12a60b08cf4d23 Reviewed-on: https://skia-review.googlesource.com/c/184194 Auto-Submit: Jim Van Verth <jvanverth@google.com> Reviewed-by: Jim Van Verth <jvanverth@google.com> Commit-Queue: Jim Van Verth <jvanverth@google.com>