temporary fix for repos that directly used DownloadHooks from git_cl.py.

TBR=phajdan.jr@chromium.org,andybons@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1768583002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@299106 0039d316-1c4b-4281-b951-d872f2087c98

git_cl.py

@@ -1604,6 +1604,9 @@ def DownloadGerritHook(force):
                    'into .git/hooks/commit-msg and '
                    'chmod +x .git/hooks/commit-msg' % src)
 
+# TODO(tandrii): remove this once repos which call this method directly are
+# upgraded.
+DownloadHooks = DownloadGerritHook
 
 @subcommand.usage('[repo root containing codereview.settings]')
 def CMDconfig(parser, args):