fix common modules not found

Author: cindyli-13

CMakeLists.txt

@@ -89,12 +89,12 @@ function(add_app_subdirectory APP_SUBDIRECTORY)
 endfunction()
 
 ## Include Rover Apps
+add_subdirectory(${ROVER_APPS_DIR}/common)
 add_app_subdirectory(${ROVER_APPS_DIR}/arm_2021)
 add_app_subdirectory(${ROVER_APPS_DIR}/gamepad_2021)
 add_app_subdirectory(${ROVER_APPS_DIR}/gimbal_2021)
 add_app_subdirectory(${ROVER_APPS_DIR}/pdb_2021)
 add_app_subdirectory(${ROVER_APPS_DIR}/science_2021)
-add_app_subdirectory(${ROVER_APPS_DIR}/common)
 
 # Include Test Apps
 add_app_subdirectory(${TEST_APPS_DIR}/test-actuator-controller)