turned off SPIR-V validation on ASAN bots

BUG=skia:

Change-Id: Ia86abbc5f0922a4818075c487c76b6fb0560a6c8
Reviewed-on: https://skia-review.googlesource.com/9800
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed