message: [lldb] Fix "code requires global destructor" warning in g_architecture_mutex
diff: @@ -286,7 +286,10 @@ struct ArchitectureInstance {
  typedef std::vector<ArchitectureInstance> ArchitectureInstances;
  +static std::mutex &GetArchitectureMutex() {
  static std::mutex g_architecture_mutex;
  + return g_architecture_mutex;
  +}
  static ArchitectureInstances &GetArchitectureInstances() {
  static ArchitectureInstances g_instances;
  @@ -296,13 +299,13 @@ static ArchitectureInstances &GetArchitectureInstances() {
  void PluginManager::RegisterPlugin(const ConstString &name,
  llvm::StringRef description,
  ArchitectureCreateInstance create_callback) {
  - std::lock_guard<std::mutex> guard(g_architecture_mutex);
  + std::lock_guard<std::mutex> guard(GetArchitectureMutex());
  GetArchitectureInstances().push_back({name, description, create_callback});
  }
  void PluginManager::UnregisterPlugin(
  ArchitectureCreateInstance create_callback) {
  - std::lock_guard<std::mutex> guard(g_architecture_mutex);
  + std::lock_guard<std::mutex> guard(GetArchitectureMutex());
  auto &instances = GetArchitectureInstances();
  for (auto pos = instances.begin(), end = instances.end(); pos != end; ++pos) {
  @@ -316,7 +319,7 @@ void PluginManager::UnregisterPlugin(
  std::unique_ptr<Architecture>
  PluginManager::CreateArchitectureInstance(const ArchSpec &arch) {
  - std::lock_guard<std::mutex> guard(g_architecture_mutex);
  + std::lock_guard<std::mutex> guard(GetArchitectureMutex());
  for (const auto &instances : GetArchitectureInstances()) {
  if (auto plugin_up = instances.create_callback(arch))
  return plugin_up;
  