message: start_px4_sitl: update Firmware path from Firmware/build_posix_sitl_default
  to Firmware/build/posix_sitl_default
diff: @@ -46,15 +46,15 @@ fi
  pushd .
  # Go to Firmware build dir.
  -cd $px4_firmware_dir/build_posix_sitl_default/tmp
  +cd $px4_firmware_dir/build/posix_sitl_default/tmp
  # And run
  $px4_firmware_dir/Tools/sitl_run.sh \
  - $px4_firmware_dir/build_posix_sitl_default/src/firmware/posix/px4 \
  + $px4_firmware_dir/build/posix_sitl_default/src/firmware/posix/px4 \
  posix-configs/SITL/init/lpe \
  none gazebo iris \
  $px4_firmware_dir \
  - $px4_firmware_dir/build_posix_sitl_default 2>1 > $log_dir/px4_sitl-$timestamp.log &
  + $px4_firmware_dir/build/posix_sitl_default 2>1 > $log_dir/px4_sitl-$timestamp.log &
  # Go back to dir where we started
  popd
  