update GUI building script.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1213 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/rtgui/SConscript

@@ -40,8 +40,11 @@ widgets/box.c
 widgets/button.c
 widgets/checkbox.c
 widgets/container.c
+widgets/combobox.c
 widgets/iconbox.c
 widgets/label.c
+widgets/listctrl.c
+widgets/menu.c
 widgets/progressbar.c
 widgets/radiobox.c
 widgets/slider.c