message: Use the new interface for graph dumping
diff: @@ -320,14 +320,14 @@ StatusOr<std::unique_ptr<Executable>> PoplarCompiler::Compile(
  if (vertex_graph != NULL) {
  std::ofstream stream;
  stream.open(vertex_graph);
  - graph->outputVertexGraph(stream);
  + graph->outputVertexGraph(stream, progs);
  }
  const char *compute_graph = getenv("TF_POPLAR_COMPUTE_GRAPH_FILENAME");
  if (compute_graph != NULL) {
  std::ofstream stream;
  stream.open(compute_graph);
  - graph->outputComputeGraph(stream);
  + graph->outputComputeGraph(stream, progs);
  }
  hlo_module->mutable_entry_computation_layout()->SetToDefaultLayout();
  