r600: Add callbacks for get_driver_uuid and get_device_uuid
r600: Add callbacks for get_driver_uuid and get_device_uuid
These callbacks are supposed to be available for GL_EXT_external_objects
Closes: #10040 (closed) CC: mesa-stable
@Triang3l you might already have this in your tree (didn't see it though).
Edited by Gert Wollny