exa2pro/starpu-max: porting work to Maxeler DFE @ 629c61e02e8f211fd4705101a9739566c41c350f

Samuel Thibault acce0b71ce Add OpenGL interoperability support		14 lat temu
..
cpu	d97cab7cc4 src/drivers: do not call pthread_exit() at the end of the drivers; just return NULL.	14 lat temu
cuda	acce0b71ce Add OpenGL interoperability support	14 lat temu
driver_common	415864e912 Bug fixed in parallel_heft.	14 lat temu
gordon	d97cab7cc4 src/drivers: do not call pthread_exit() at the end of the drivers; just return NULL.	14 lat temu
opencl	d07c947598 Allow applications to run the OpenCL drivers themselves.	14 lat temu