Unless the test also passed validation.
Prevents clobbering expected validation failures when you've only checked tint didn't error.
Change-Id: I44be0c8b1f9ef1a0df51bba81f5ad694715204b8
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53383
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>