Add another newline before the TBR

Previously, the TBR notation appears on the first line of the description,
which prevented the commit-queue from recognizing it as a valid notation.  This
patch moves it to its own line, causing the patch to be accepted by the
commit-queue.

BUG=
TEST=


Review URL: http://codereview.chromium.org/7617013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96436 0039d316-1c4b-4281-b951-d872f2087c98

tools/safely-roll-webkit.py

@@ -68,7 +68,7 @@ def main():
       ['git', 'checkout', '-b', 'webkit_roll', 'origin/trunk'])
   try:
     process_deps(os.path.join(root_dir, 'DEPS'), new_rev)
-    commit_msg = msg + '\nTBR=\n'
+    commit_msg = msg + '\n\nTBR=\n'
     subprocess2.check_output(['git', 'commit', '-m', commit_msg, 'DEPS'])
     subprocess2.check_call(['git', 'diff', 'origin/trunk'])
     subprocess2.check_call(['git', 'cl', 'upload', '--use-commit-queue'])