SkQP: add junit app

Change-Id: Ic32eaec6cce1509f07e7cf610717d3b12d335c89
Reviewed-on: https://skia-review.googlesource.com/83921
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
10 files changed