Use clang-foramt 3.8 insteady of 6.0.0, otherwise clang-format will

format memory_optimized_pass.cc again. test=develop

lite/core/mir/memory_optimize_pass.cc

@@ -52,8 +52,8 @@ void MemoryOptimizePass::CollectLifeCycleByDevice(
                                             "feed",
                                             "fetch"};
 
-  auto insert_invalid_op_nodes_for_specific_target =
-      [&](std::set<std::string> op_node_set, TargetType specific_target) {
+  auto insert_invalid_op_nodes_for_specific_target = [&](
+      std::set<std::string> op_node_set, TargetType specific_target) {
     std::set<std::string> invalid_op_nodes_opencl = {"layout", "fc"};
     for (auto& op_node : graph->StmtTopologicalOrder()) {
       if (!op_node->IsStmt()) continue;