Add PRESUBMIT check for GYP files including source files above itself.

This is needed because some tools does not support files
located above the project generated.

BUG=4185
R=phoglund@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/34069004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@8166 4adac7df-926f-26a2-2b94-8c16560cd09d