Add the NOTRY command on roll_deps.py

Motivation: The current workflow is to submit via `git cl dcommit`.
As we move to automated nightly creation of the DEPS roll CLs, we want
to make it easier for the submitter to speed along a clean roll.

BUG=skia:
R=borenet@google.com, robertphillips@google.com, rmistry@google.com

Author: halcanary@google.com

Review URL: https://codereview.chromium.org/133933009

git-svn-id: http://skia.googlecode.com/svn/trunk@13211 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed