adding proper removal of observer for stacked event loops, using cfrunloop for console on osx as well

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63698 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/evtloop.h

@@ -70,6 +70,9 @@ protected:
     // the loop exit code
     int m_exitcode;
     
+    // cfrunloop
+    CFRunLoopRef m_runLoop;
+    
     // runloop observer
     CFRunLoopObserverRef m_runLoopObserver;