message: Expose tensorflow/c/**/*.h in tensorflow pip package includes.
  These are required for code that relies on e.g. tensorflow/python/**/*.h
  includes, since these use the C api.
diff: @@ -246,6 +246,7 @@ headers = (
  list(find_files('*.proto', 'tensorflow/compiler')) +
  list(find_files('*.proto', 'tensorflow/core')) +
  list(find_files('*.proto', 'tensorflow/python')) +
  + list(find_files('*.h', 'tensorflow/c')) +
  list(find_files('*.h', 'tensorflow/cc')) +
  list(find_files('*.h', 'tensorflow/compiler')) +
  list(find_files('*.h', 'tensorflow/core')) +
  