GL_NV_uniform_buffer_unified_memory
http://www.opengl.org/registry/specs/NV/uniform_buffer_unified_memory.txt
GL_NV_uniform_buffer_unified_memory
	GL_UNIFORM_BUFFER_UNIFIED_NV 0x936E
	GL_UNIFORM_BUFFER_ADDRESS_NV 0x936F
	GL_UNIFORM_BUFFER_LENGTH_NV 0x9370
