debugger: add another dynamic type test

Task-number: QTCREATORBUG-6863

Change-Id: I94c0701a3ef0ebf6e166f3a65ccafef146549641
Reviewed-by: hjk <qthjk@ovi.com>

tests/manual/debugger/simple/simple_test_app.cpp

@@ -5866,6 +5866,8 @@ namespace bug6863 {
 
     void test6863()
     {
+        QFile file("/tmp/tt");
+        setProp(&file);
         MyObject obj;
         setProp(&obj);
     }