Add retries to capture_skps
Add retries to capture_skps

BUG=skia:5373
TBR=benjaminwagner

Review-Url: https://codereview.chromium.org/2027233002

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