We don't want to run it in the DEPS directory, which is apperently what
the default behavior is.

BUG=339171

Review URL: https://codereview.chromium.org/184793003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@254266 0039d316-1c4b-4281-b951-d872f2087c98