[proberk] Add battlestar gold prober
[proberk] Add battlestar gold prober

Change-Id: I40440c8bb2efa2a16ccb7e907421d512fdc27849
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/519416
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot