message: workflows: also run backend unit test on Linux
  We had missed that earlier.
diff: @@ -52,6 +52,8 @@ jobs:
  run: cmake --build build/release -j 2
  - name: test
  run: ./build/release/src/unit_tests_runner
  + - name: test (mavsdk_server)
  + run: ./build/release/src/backend/test/unit_tests_backend
  ubuntu18-check-style:
  name: ubuntu-18.04 (check style)
  