Fix git-cl --contributor flag support for presubmit checks.

Chromium's presubmit check assumes the author is an email address.

[email protected]
BUG=
TEST=

Review URL: http://codereview.chromium.org/7484002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@93645 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed