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: I57e0d8caac2bc2edb10c8252e06ffdb9a5ccf48b
5 files changed