Roll gyp dependency to 1564.

This is to fix the standalone gyp build. It couldn't handle changes made in r1721. This is the latest version.
Review URL: https://codereview.appspot.com/7204049

git-svn-id: http://angleproject.googlecode.com/svn/trunk@1727 736b8ea6-26fd-11df-bfd4-992fa37f6226