Re-enable ProcessorOptimizationValidationTest on iOS.

Change-Id: I05aae2e86cd7a219ab98e882bb6041263b4aca71
Reviewed-on: https://skia-review.googlesource.com/8318
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
3 files changed