hotspot: init MonitoringSupport_lock not only in G1GC case

fix javax/management/MBeanServer/OldMBeanServerTest.java

Author: superajun-wsj

src/hotspot/share/runtime/mutexLocker.cpp

@@ -227,9 +227,13 @@ void mutex_init() {
 
     def(MarkStackFreeList_lock     , PaddedMutex  , leaf     ,   true,  _safepoint_check_never);
     def(MarkStackChunkList_lock    , PaddedMutex  , leaf     ,   true,  _safepoint_check_never);
-
+#if HOTSPOT_TARGET_CLASSLIB == 8
+  }
+  def(MonitoringSupport_lock     , PaddedMutex  , native   ,   true,  _safepoint_check_never);      // used for serviceability monitoring support
+#else
     def(MonitoringSupport_lock     , PaddedMutex  , native   ,   true,  _safepoint_check_never);      // used for serviceability monitoring support
   }
+#endif
   def(StringDedup_lock             , PaddedMonitor, leaf,        true,  _safepoint_check_never);
   def(StringDedupIntern_lock       , PaddedMutex  , leaf,        true,  _safepoint_check_never);
   def(ParGCRareEvent_lock          , PaddedMutex  , leaf,        true,  _safepoint_check_always);