Stabilize autotests using QTest::qWaitForWindowShown on non-X11.

X11 is currently the only platform with a "real" implementation of
QTest::qWaitForWindowShown.  All others merely process events for some
fixed interval, and assume that this is sufficient for the window to be
placed.  In practice, the current interval is too short for slower
machines.

Change-Id: I956cd747d0b30577f5072a9a08da88dabc76906c
Reviewed-on: http://codereview.qt.nokia.com/3060
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@nokia.com>
Reviewed-by: Jason McDonald <jason.mcdonald@nokia.com>

src/testlib/qtestsystem.h

@@ -76,12 +76,9 @@ namespace QTest
 #if defined(Q_WS_X11)
         qt_x11_wait_for_window_manager(window);
         QCoreApplication::processEvents();
-#elif defined(Q_WS_QWS)
-        Q_UNUSED(window);
-        qWait(100);
 #else
         Q_UNUSED(window);
-        qWait(50);
+        qWait(200);
 #endif
         return true;
     }