Yet another attempt to enforce using PX4’s mavlink in sitl_gazebo

assets/patches/sitl_gazebo.patch

@@ -1,21 +1,16 @@
 diff --git a/cmake/FindMAVLink.cmake b/cmake/FindMAVLink.cmake
-index 8de3079..c203237 100644
+index 8de3079..3fdae02 100644
 --- a/cmake/FindMAVLink.cmake
 +++ b/cmake/FindMAVLink.cmake
-@@ -46,13 +46,6 @@ find_path(_MAVLINK_INCLUDE_DIR
-     NO_CMAKE_SYSTEM_PATH
+@@ -19,6 +19,7 @@ set(_MAVLINK_EXTRA_SEARCH_HINTS
+     ${CMAKE_SOURCE_DIR}/mavlink/
+     ../../mavlink/
+     ../mavlink/
++    $ENV{HOME}/Firmware/mavlink/include
+     ${CATKIN_DEVEL_PREFIX}/
      )
  
--# look specifically for the ROS version if no other was found
--find_path(_MAVLINK_INCLUDE_DIR
--   NAMES mavlink/v1.0/mavlink_types.h mavlink/v2.0/mavlink_types.h
--   PATH_SUFFIXES include
--   PATHS /opt/ros/${ROS_DISTRO}/
--   )
--
- # read the version
- if (EXISTS ${_MAVLINK_INCLUDE_DIR}/mavlink/config.h)
-     file(READ ${_MAVLINK_INCLUDE_DIR}/mavlink/config.h MAVLINK_CONFIG_FILE)
+ 
 diff --git a/package.xml b/package.xml
 index ae0fb34..12f17b8 100644
 --- a/package.xml