opengl: Update registry and headers from Khronos

gl.xml @ r26697:
https://cvs.khronos.org/svn/repos/ogl/trunk/doc/registry/public/api

GLES headers @ r26698:
https://cvs.khronos.org/svn/repos/registry/trunk/public/gles/api

Bug: 15028495
Change-Id: Id8e7aaf8a09ec6f47dc3a3b14b95d0ddf35d50f6
5 files changed