Export -lros_bridge -lros_interpreter in pc file generated by cmake module

  pc file is generated both by catkin and by cmake module. Keep both up to date
  for security.

CMakeLists.txt

@@ -159,6 +159,8 @@ add_subdirectory(src)
 add_service_files( FILES RunPythonFile.srv )
 generate_messages( DEPENDENCIES std_msgs )
 catkin_package(CATKIN_DEPENDS message_runtime LIBRARIES ros_bridge ros_interpreter)
+# Add libraries in pc file generated by cmake submodule
+PKG_CONFIG_APPEND_LIBS(ros_bridge ros_interpreter)
 
 #install ros executables
 install(PROGRAMS