Build fix for wxUSE_CONSOLE_EVENTLOOP==0 under Unix

Don't declare GetEventLoopSourcesManager() in Unix wxAppTraits if
console event loops are not used.

See https://github.com/wxWidgets/wxWidgets/pull/953

include/wx/unix/apptbase.h

@@ -48,11 +48,11 @@ public:
     virtual wxFDIOManager *GetFDIOManager();
 #endif // wxUSE_SOCKETS
 
-#if wxUSE_EVENTLOOP_SOURCE
+#if wxUSE_CONSOLE_EVENTLOOP && wxUSE_EVENTLOOP_SOURCE
     // Return a non-NULL pointer to the object responsible for managing the
     // event loop sources in this kind of application.
     virtual wxEventLoopSourcesManagerBase* GetEventLoopSourcesManager();
-#endif // wxUSE_CONSOLE_EVENTLOOP
+#endif // wxUSE_CONSOLE_EVENTLOOP && wxUSE_CONSOLE_EVENTLOOP
 
 protected:
     // Wait for the process termination by running the given event loop until