message: Fix broken link in performance models
  This fix fixes broken link in performance models as models repo moved
  inception to `models/research/inception`:
  `https://github.com/tensorflow/models/tree/master/inception#getting-started`
  >
  `https://github.com/tensorflow/models/tree/master/research/inception#getting-started`
diff: @@ -345,7 +345,7 @@ executing the main script
  * **`num_gpus`**: Number of GPUs to use.
  * **`data_dir`**: Path to data to process. If not set, synthetic data is used.
  To use Imagenet data use these
  - [instructions](https://github.com/tensorflow/models/tree/master/inception#getting-started)
  + [instructions](https://github.com/tensorflow/models/tree/master/research/inception#getting-started)
  as a starting point.
  * **`batch_size`**: Batch size for each GPU.
  * **`variable_update`**: The method for managing variables: `parameter_server`
  