fix colcon build issue with find_pkg.

Signed-off-by: VictorLee <[email protected]>

Author: ZhenshengLee

rosidl_typesupport_protobuf/package.xml

@@ -8,6 +8,8 @@
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake</buildtool_depend>
+  <buildtool_depend>rosidl_generator_c</buildtool_depend>
+  <buildtool_export_depend>rosidl_generator_c</buildtool_export_depend>
 
   <export>
     <architecture_independent/>

rosidl_typesupport_protobuf_c/package.xml

@@ -12,12 +12,14 @@
   <buildtool_depend>rosidl_generator_c</buildtool_depend>
   <buildtool_depend>rosidl_adapter_proto</buildtool_depend>
   <buildtool_depend>rosidl_typesupport_protobuf</buildtool_depend>
+  <buildtool_depend>rosidl_typesupport_introspection_cpp</buildtool_depend>
 
   <buildtool_export_depend>ament_cmake</buildtool_export_depend>
   <buildtool_export_depend>rosidl_cmake</buildtool_export_depend>
   <buildtool_export_depend>rosidl_adapter_proto</buildtool_export_depend>
   <buildtool_export_depend>rosidl_generator_c</buildtool_export_depend>
   <buildtool_export_depend>rosidl_typesupport_protobuf</buildtool_export_depend>
+  <buildtool_export_depend>rosidl_typesupport_introspection_cpp</buildtool_export_depend>
 
   <build_export_depend>rmw</build_export_depend>