GR_TEST_UTILS fixes

Fixes build of Skia lib when GR_TEST_UTILS=0

Makes GR_TEST_UTILS=0 for official builds

Makes "Mini" builder bot exercise building GPU with is_official_build=true

Bug: skia:6786
Change-Id: I6186683a3a216d2e779645bd9e8276a66bcff4d5
Reviewed-on: https://skia-review.googlesource.com/21524
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
59 files changed