install include files (#2482)

Author: christian-rauch

ros2_control_test_assets/CMakeLists.txt

@@ -15,11 +15,18 @@ install(
   DESTINATION share/ros2_control_test_assets/urdf
 )
 
+install(
+  DIRECTORY include/
+  DESTINATION include
+)
+
 install(TARGETS ros2_control_test_assets
   EXPORT export_ros2_control_test_assets
   ARCHIVE DESTINATION lib
   LIBRARY DESTINATION lib
   RUNTIME DESTINATION bin
+  INCLUDES
+  DESTINATION include
 )
 
 ament_export_targets(export_ros2_control_test_assets HAS_LIBRARY_TARGET)