add definition for GLchar to match khronos verion
http://www.khronos.org/registry/gles/api/2.0/gl2.h
and Chrome's version
http://src.chromium.org/viewvc/chrome/trunk/src/gpu/GLES2/gl2.h?revision=52541&view=markup

I am not sure about which ebuild should bump(probably x11-drivers/opengles-headers) and whether I could bump it in the same CL.

Change-Id: Id60cef14201e389f8434f3c783de0645281d014d

BUG=chromeos:1813
TEST=None.

Review URL: http://codereview.chromium.org/5753001
5 files changed