message: Update the document for label_image example cmake build flow.
diff: @@ -102,7 +102,7 @@ CMake project. Please refer the
  ["Create a CMake project which uses TensorFlow Lite"](#create_a_cmake_project_which_uses_tensorflow_lite)
  section.
  -### Step 6. Build TensorFlow Lite Benchmark Tool
  +### Step 6. Build TensorFlow Lite Benchmark Tool and Label Image Example
  In the tflite_build directory,
  @@ -110,6 +110,10 @@ In the tflite_build directory,
  cmake --build . -j -t benchmark_model
  ```
  +```sh
  +cmake --build . -j -t label_image
  +```
  +
  ## Available Options to build TensorFlow Lite
  Here is the list of available options. You can override it with
  