Add link to swarming logs in CT start mail smart actions
Add link to swarming logs in CT start mail smart actions

BUG=skia:5397
TBR=benjaminwagner

Review-Url: https://codereview.chromium.org/2041003002

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