Disable SkSL array-cast test on Adreno.

This is testing the same basic functionality as ArrayComparison, and
triggers the same Adreno bug.

Change-Id: Iad8c1d5e467529242101d4425417f8eb6779527a
Bug: skia:12332
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/438477
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2 files changed