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>
1 file changed