clover: add trivial clCreateCommandQueueWithProperties implementation
It's not adding 2.0 features, but it's enough to run the 2.0 CTS on top of clover and probably most CL applications using it.
We just fail if we hit unknown properties and that's probably good enough until we implement the other bits properly.
Signed-off-by: Karol Herbst kherbst@redhat.com