Fix checks of GR_TEST_UTILS.

We had lots of checks just checking defined but we always define
GR_TEST_UTILS

Change-Id: I588c50ddd91f71618a96ab6c9eda2050b423f611
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/319682
Commit-Queue: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
14 files changed