qemu: Test for virtio-9p-ccw support
    
    This patch adds a test for the qemu command line generation.
    
    Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
    Reviewed-by: Jason J. Herne <jjherne@us.ibm.com>
    Reviewed-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com>