Add PRESUBMIT.py and keep it informational since there's still a lot of errors.
Add PRESUBMIT.py and keep it informational since there's still a lot of errors.

TEST=PRESUBMIT.py
BUG=none

Review URL: http://codereview.chromium.org/3526024

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@61841 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build