[turbofan] Add --csa-verify flag that enables machine graph verification of code stubs.

src/compiler/machine-graph-verifier.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_MACHINE_GRAPH_VERIFIER_H_
 #define V8_COMPILER_MACHINE_GRAPH_VERIFIER_H_
 
 #include "src/base/macros.h"
 
 namespace v8 {
 namespace internal {
 class Zone;
 namespace compiler {
 
 class Graph;
 class Linkage;
 class Schedule;
 
 // Verifies properties of a scheduled graph, such as that the nodes' inputs are
 // of the correct type.
 class MachineGraphVerifier {
  public:
   static void Run(Graph* graph, Schedule const* const schedule,
-                  Linkage* linkage, Zone* temp_zone);
+                  Linkage* linkage, bool is_stub, Zone* temp_zone);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_GRAPH_VERIFIER_H_