message: fixed comment for on_host bool
diff: -/* Copyright 2019 The TensorFlow Authors. All Rights Reserved.
  +/* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  @@ -55,7 +55,7 @@ extern "C" {
  // Allocator Attributes used for tensor allocation.
  typedef struct TF_AllocatorAttributes {
  size_t struct_size;
  - // Set flag to 0 for CPU allocation, else 1.
  + // Set boolean to 0 for CPU allocation, else 1.
  unsigned char on_host;
  } TF_AllocatorAttributes;
  