fix unrecognized build type with catkin_make_isolated

order of statements is somehow revelant; catkin_make_isolated would not detect the build type; build farm jobs were failing; https://build.ros.org/job/Ndev__mqtt_client__ubuntu_focal_amd64/10/console

Author: lreiher

mqtt_client/package.xml

@@ -36,8 +36,8 @@
   <depend condition="$ROS_VERSION == 1">topic_tools</depend>
 
   <export>
-    <build_type condition="$ROS_VERSION == 2">ament_cmake</build_type>
     <build_type condition="$ROS_VERSION == 1">catkin</build_type>
+    <build_type condition="$ROS_VERSION == 2">ament_cmake</build_type>
     <nodelet condition="$ROS_VERSION == 1" plugin="${prefix}/nodelet_plugins.xml" />
   </export>
 

mqtt_client_interfaces/package.xml

@@ -29,8 +29,8 @@
   <exec_depend condition="$ROS_VERSION == 1">message_runtime</exec_depend>
 
   <export>
-    <build_type condition="$ROS_VERSION == 2">ament_cmake</build_type>
     <build_type condition="$ROS_VERSION == 1">catkin</build_type>
+    <build_type condition="$ROS_VERSION == 2">ament_cmake</build_type>
   </export>
 
   <member_of_group condition="$ROS_VERSION == 2">rosidl_interface_packages</member_of_group>