TF SavedModel's Signature concept.
    *   Deprecate Makefile builds. Makefile users need to migrate their builds
        to CMake or Bazel. Please refer to the
        [Build TensorFlow Lite with CMake](https://www.tensorflow.org/lite/guide/build_cmake)
        and
        [Build TensorFlow Lite for ARM boards](https://www.tensorflow.org/lite/guide/build_arm)
        for the migration.