Update GYP PRESUBMIT.py to adhere to the new copyright boilerplace policy.
Update GYP PRESUBMIT.py to adhere to the new copyright boilerplace policy.

BUG=chromium:140977
Review URL: https://codereview.chromium.org/11967026
witwall/gyp,witwall/gyp,witwall/gyp,witwall/gyp,witwall/gyp