add test_suites attribute to CtsSkQPTestCases build target

Change-Id: I064a64f793410732a6f79176a9d4801da92a0169
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/513892
Auto-Submit: Nathaniel Nifong <nifong@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Derek Sollenberger <djsollen@google.com>
1 file changed