ros-control: updating to 0.9.4

recipes-ros/ros-control/controller-interface_0.9.4.bb

recipes-ros/ros-control/controller-manager-msgs_0.9.4.bb

recipes-ros/ros-control/controller-manager-tests_0.9.4.bb

recipes-ros/ros-control/controller-manager_0.9.4.bb

recipes-ros/ros-control/hardware-interface_0.9.4.bb

recipes-ros/ros-control/joint-limits-interface_0.9.4.bb

recipes-ros/ros-control/ros-control.inc

recipes-ros/ros-control/transmission-interface_0.9.4.bb