Disable all unit tests on Spin513

Also add a Debug job, to see if we get any more information from
failures.

Bug: skia:12486
Change-Id: I434e2f5bb79f74dc1b7c6e04efeec6c704159c09
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/643456
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
3 files changed