fixed SPIR-V vector equality tests

BUG=skia:

Change-Id: I6ae597d16c0bd17ce4c0316e7ef65cd52643f4b7
Reviewed-on: https://skia-review.googlesource.com/8804
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed