Import OpenGL ES 3.0 headers from Khronos SVN

Add MODULE_LICENSE_MIT: The GLES headers use an MIT license or a
slight variant of it (the "SGI Free Software License B version 2.0",
http://oss.sgi.com/projects/FreeB/).

Change-Id: Ic8f946341cdd0d579f51b6f7a3ee109cd31b1691
5 files changed