jsk_recognition_msgs : setup.py need src/jsk_recognition_msgs

[k-okada]

with out this fix, master branch fails with

[jsk_recognition_msgs:install] + cd /home/k-okada/catkin_ws/ws_recognition/src/jsk_recognition/jsk_recognition_msgs               
[jsk_recognition_msgs:install] + mkdir -p /home/k-okada/catkin_ws/ws_recognition/install/lib/python2.7/dist-packages              
[jsk_recognition_msgs:install] + /usr/bin/env PYTHONPATH=/home/k-okada/catkin_ws/ws_recognition/install/lib/python2.7/dist-packages:/home/k-okada/catkin_ws/ws_recognition/build/jsk_recognition_msgs/lib/python2.7/dist-packages:/home/k-okada/catkin_ws/ws_recognition/install/lib/python2.7/dist-packages:/opt/ros/melodic/lib/python2.7/dist-packages:/home/k-okada/pynaoqi/pynaoqi-python2.7-2.5.5.5-linux64/lib/python2.7/site-packages CATKIN_BINARY_DIR=/home/k-okada/catkin_ws/ws_recognition/build/jsk_recognition_msgs /usr/bin/python2 /home/k-okada/catkin_ws/ws_recognition/src/jsk_recognition/jsk_recognition_msgs/setup.py egg_info --egg-base /home/k-okada/catkin_ws/ws_recognition/build/jsk_recognition_msgs build --build-base /home/k-okada/catkin_ws/ws_recognition/build/jsk_recognition_msgs install --root=/ --install-layout=deb --prefix=/home/k-okada/catkin_ws/ws_recognition/install --install-scripts=/home/k-okada/catkin_ws/ws_recognition/install/bin
[jsk_recognition_msgs:install] running egg_info                                                                                   
[jsk_recognition_msgs:install] writing /home/k-okada/catkin_ws/ws_recognition/build/jsk_recognition_msgs/jsk_recognition_msgs.egg-info/PKG-INFO
[jsk_recognition_msgs:install] writing top-level names to /home/k-okada/catkin_ws/ws_recognition/build/jsk_recognition_msgs/jsk_recognition_msgs.egg-info/top_level.txt
[jsk_recognition_msgs:install] writing dependency_links to /home/k-okada/catkin_ws/ws_recognition/build/jsk_recognition_msgs/jsk_recognition_msgs.egg-info/dependency_links.txt
[jsk_recognition_msgs:install] error: package directory 'src/jsk_recognition_msgs' does not exist                                 
[jsk_recognition_msgs:install] CMake Error at catkin_generated/safe_execute_install.cmake:4 (message):                            
[jsk_recognition_msgs:install]                                                                                                    
[jsk_recognition_msgs:install]   execute_process(/home/k-okada/catkin_ws/ws_recognition/build/jsk_recognition_msgs/catkin_generated/python_distutils_install.sh)
[jsk_recognition_msgs:install]   returned error code                                                                              
[jsk_recognition_msgs:install] Call Stack (most recent call first):                                                               
[jsk_recognition_msgs:install]   cmake_install.cmake:137 (include)                                                                
[jsk_recognition_msgs:install]                                                                                                    
[jsk_recognition_msgs:install]                                                                                                    
[jsk_recognition_msgs:install] Makefile:109: recipe for target 'install' failed   

Not sure why CI passed