message: Enable tensors with unknown dimension in explicit_batch_mode
diff: @@ -291,8 +291,9 @@ Status ValidateTensorProperties(const string& producer_node_type,
  }
  if (validation_only) return Status::OK();
  - // Following are validations at runtime.
  + // Following are validations for creating TRT network and engine.
  + if (use_implicit_batch) {
  for (int d = first_trt_dim; d < shape.dims(); ++d) {
  if (shape.dim_size(d) < 0) {
  return errors::InvalidArgument(
  @@ -300,6 +301,7 @@ Status ValidateTensorProperties(const string& producer_node_type,
  " has an unknown non-batch dimension at dim ", d);
  }
  }
  + }
  return Status::OK();
  }
  