otherwise the battery estimator does not compute bat_v_empty_dynamic correctly

readdir_r is deprecated since glibc version 2.24 and glibc manual
recomends usage of readdir instead of readdir_r.
Replacing readdir_r by readdir will also not be a problem for Nuttx,
because readdir_r is using readdir and filling parameters with the
return information.

Signed-off-by: Otavio Pontes <otavio.pontes@intel.com>

* Use sorted to fix python3 build error

* Add drv_hrt.h include to Bebop df wrappers

This will make the build works in distros that have Python 3 as default
and will not break anything in distros that have Python 2 as default.

This reverts commit 2a90f7e9.

MAVLink: Cleanup of port handling, switch to MAVLink 2 if receiving MAVLink 2. Announce MAVLink 2 capability in autopilot_version message

commit

Flight test went well, merging.

Merging this as it is definitely more robust than what we have now.

* Change to sitl to allow no board rotation for gazebo.

* Fix typo in typhoon launch file and create config for lpe.

* Exit early on test failures

this allows selecting another range device such as a lidar by starting that app first