The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/toolchain-utils/+/c371d6b62a44e661fe24eb84d1e9463bdf6b6bf4

commit c371d6b62a44e661fe24eb84d1e9463bdf6b6bf4
Author: Caroline Tice <cmtice@google.com>
Date: Mon Apr 16 08:45:17 2018

[toolchain-utils] Add info to rotating builder logs.

Due to recent changes in the tryjob launching system, the current
rotating builder logs are empty.  This CL causes the command and
resulting buildbucket_id to be printed, and therefore go into
the logs, so the sheriffs have some way of finding out what boards
were built and what the buildbucket ids were for the builds.  Also
fix some format errors (forced by commit hook).

BUG= chromium:833195 
TEST=Tested for the last two nights on chrotomation2.

Change-Id: Ic8e18baf1bc3f39af574d673962e43e830356210
Reviewed-on: https://chromium-review.googlesource.com/1013227
Commit-Ready: Caroline Tice <cmtice@chromium.org>
Tested-by: Caroline Tice <cmtice@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>

[modify] https://crrev.com/c371d6b62a44e661fe24eb84d1e9463bdf6b6bf4/cros_utils/buildbot_utils.py