message: Fix a path in README.md
diff: @@ -30,7 +30,7 @@ cp ~/graphs/inception5h/* tensorflow/examples/ios/simple/data/
  long time since it is big (~450MB). For example, if you want to run the
  simple example, then:
  ```bash
  -cd tensorflow/ios/simple
  +cd tensorflow/examples/ios/simple
  pod install
  open tf_simple_example.xcworkspace # obs, not the .xcodeproj directory
  ```
  