Better support for openGLES 2.0 extensions

Using the OpenGL extensions mechanism, it allows software developers
to access additional performance for rendering. In classic emulator,
extensions based on host OS. So we should add more keywords there to
make better support for it.

Change-Id: Ic663170428a785b7f8cdb66e1c14f3993caf0b85
Signed-off-by: Lizhe Liu <lizhe.liu@intel.com>
3 files changed