Couple of miscellaneous fixes

utils_misc: Need to add parameter for a %s directive in message
            for get_qemu_binary method

utils_test/libvirt: Use 'permissive' not 'Permissive' since the set_status
                    expects the lower case

virsh: Simple typo in comment for net_state_dict() which was copied from
       a similar pool function, but the comment change was missed