prober: Add make push.
prober: Add make push.

BUG=skia:
TBR=borenet@google.com

Review URL: https://codereview.chromium.org/1739013002

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