Restore thread counter (world may be not ready yet)

Remove dumb 1300ms timeout.

rpcs3/Emu/System.cpp

@@ -1600,6 +1600,14 @@ void Emulator::Stop(bool restart)
 
 	cpu_thread::stop_all();
 	g_fxo->reset();
+
+	while (thread_ctrl::get_count())
+	{
+		std::this_thread::sleep_for(10ms);
+	}
+
+	sys_log.notice("All threads have been stopped.");
+
 	lv2_obj::cleanup();
 	idm::clear();