message: Update nn_impl.py
  fix package name
diff: @@ -401,7 +401,7 @@ def compute_average_loss(per_example_loss,
  labels, predictions)
  # Compute loss that is scaled by sample_weight and by global batch size.
  - return tf.compute_average_loss(
  + return tf.nn.compute_average_loss(
  per_example_loss,
  sample_weight=sample_weight,
  global_batch_size=GLOBAL_BATCH_SIZE)
  @@ -452,7 +452,7 @@ def scale_regularization_loss(regularization_loss):
  labels, predictions)
  # Compute loss that is scaled by sample_weight and by global batch size.
  - loss = tf.compute_average_loss(
  + loss = tf.nn.compute_average_loss(
  per_example_loss,
  sample_weight=sample_weight,
  global_batch_size=GLOBAL_BATCH_SIZE)
  