(robot qnx install) Adjusting to https://github.com/start-jsk/rtmros_hironx/pull/198

Currently [the file touched in `/opt/jsk` is "`.checked`"](https://github.com/k-okada/rtmros_hironx/blob/81d29cc98997ae0e1876c2cd3198ba1febcb2ad2/hironx_ros_bridge/robot/robot-system-check.sh#L51) but [the PReq checks `.checking`](https://github.com/start-jsk/rtmros_hironx/pull/198). It's easier to change what to check rather than the filename (that involves checksum to change).