message: ycm_extra_conf: fix after folder structure changed
  This means my vim symbol and file lookup works a little better.
diff: @@ -61,51 +61,51 @@ flags = [
  '-I',
  '.',
  '-I',
  -'core',
  +'src/core',
  '-I',
  -'core/include/mavsdk',
  +'src/core/include/mavsdk',
  '-I',
  -'plugins/action/include',
  +'src/plugins/action/include',
  '-I',
  -'plugins/calibration/include',
  +'src/plugins/calibration/include',
  '-I',
  -'plugins/camera/include',
  +'src/plugins/camera/include',
  '-I',
  -'plugins/follow_me/include',
  +'src/plugins/follow_me/include',
  '-I',
  -'plugins/gimbal/include',
  +'src/plugins/gimbal/include',
  '-I',
  -'plugins/info/include',
  +'src/plugins/info/include',
  '-I',
  -'plugins/log_files/include',
  +'src/plugins/log_files/include',
  '-I',
  -'plugins/logging/include',
  +'src/plugins/logging/include',
  '-I',
  -'plugins/mission/include',
  +'src/plugins/mission/include',
  '-I',
  -'plugins/mission_raw/include',
  +'src/plugins/mission_raw/include',
  '-I',
  -'plugins/offboard/include',
  +'src/plugins/offboard/include',
  '-I',
  -'plugins/param/include',
  +'src/plugins/param/include',
  '-I',
  -'plugins/telemetry/include',
  +'src/plugins/telemetry/include',
  '-I',
  -'plugins/mavlink_passthrough/include',
  +'src/plugins/mavlink_passthrough/include',
  '-I',
  -'backend/src',
  +'src/backend/src',
  '-isystem',
  '/usr/include'
  '-isystem',
  '/usr/include/c++/8',
  '-isystem',
  -'third_party/mavlink/include',
  +'src/third_party/mavlink/include',
  '-isystem',
  -'./third_party/tinyxml2',
  +'src/third_party/tinyxml2',
  '-isystem',
  -'./third_party/gtest/googletest/include',
  +'src//third_party/gtest/googletest/include',
  '-isystem',
  -'./plugins/mission/third_party/json11'
  +'src/plugins/mission/third_party/json11'
  ]
  