message: Get "distribute" library files out of the "training" target.
diff: @@ -3423,6 +3423,8 @@ py_library(
  # file):
  "training/basic_session_run_hooks.py",
  "training/checkpoint_management.py",
  + "training/distribute.py",
  + "training/distribution_strategy_context.py",
  "training/saveable_object.py",
  "training/saver.py",
  "training/session_run_hook.py",
  @@ -3440,6 +3442,7 @@ py_library(
  ":control_flow_ops",
  ":data_flow_ops",
  ":device",
  + ":distribute",
  ":errors",
  ":framework",
  ":framework_for_generated_wrappers",
  