message: Register HostCount and ChipsPerHost API to executor_fn.
diff: @@ -112,6 +112,8 @@ tensorflow::Status SetExecutorStructFn(void* library_handle) {
  TFTPU_SET_FN(executor_fn, TpuTopology_LogicalDevicesPerHost);
  TFTPU_SET_FN(executor_fn, TpuTopology_LogicalDevicesPerChip);
  + TFTPU_SET_FN(executor_fn, TpuTopology_HostCount);
  + TFTPU_SET_FN(executor_fn, TpuTopology_ChipsPerHost);
  TFTPU_SET_FN(executor_fn, TpuTopology_ChipBounds_X);
  TFTPU_SET_FN(executor_fn, TpuTopology_ChipBounds_Y);
  TFTPU_SET_FN(executor_fn, TpuTopology_ChipBounds_Z);
  