rostopic: adding run-time dependency
rostopic: adding run-time dependency

The rostopic tool needs the rosbag python module for its execution.

bulwahn/meta-ros,bmwcarit/meta-ros,simium/meta-ros,rapyuta/meta-ros,bmwcarit/meta-ros,bulwahn/meta-ros,bulwahn/meta-ros,KristofRobot/meta-ros,rapyuta/meta-ros,bmwcarit/meta-ros,rapyuta/meta-ros,KristofRobot/meta-ros,bmwcarit/meta-ros,simium/meta-ros,simium/meta-ros