git cl desc: add test that shows BUG= breaking Change-Id footer.
git cl desc: add test that shows BUG= breaking Change-Id footer.

BUG=614587
R=yyanagisawa@chromium.org,andybons@chromium.org

Review-Url: https://codereview.chromium.org/2033783002

git-svn-id: fd409f4bdeea2bb50a5d34bb4d4bfc2046a5a3dd@300690 0039d316-1c4b-4281-b951-d872f2087c98

CoherentLabs/depot_tools,primiano/depot_tools,CoherentLabs/depot_tools,primiano/depot_tools,primiano/depot_tools