Provide the step name for buildslave hang alerts
Provide the step name for buildslave hang alerts

TBR=jcgregorio
BUG=skia:3961

Review URL: https://codereview.chromium.org/1667273005

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