message: added comment to on_host flag
diff: @@ -55,6 +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.
  unsigned char on_host;
  } TF_AllocatorAttributes;
  