interface kit: added compatibility symbols for BeAE for #8354

* _ZN5BMenu16InvalidateLayoutEb for GCC4
* InvalidateLayout__7BSliderb for GCC2

src/kits/interface/Menu.cpp

@@ -2983,14 +2983,10 @@ get_menu_info(menu_info* info)
 }
 
 
-#if __GNUC__ == 2
-
-
 extern "C" void
-InvalidateLayout__5BMenub(BMenu* menu)
+B_IF_GCC_2(InvalidateLayout__5BMenub,_ZN5BMenu16InvalidateLayoutEb)(
+	BMenu* menu, bool descendants)
 {
 	menu->InvalidateLayout();
 }
 
-
-#endif

src/kits/interface/Slider.cpp

@@ -2229,4 +2229,14 @@ _ReservedSlider3__7BSlider(BSlider* slider, const BFont* font,
 	slider->BSlider::SetFont(font, properties);
 }
 
+
+extern "C" void
+InvalidateLayout__7BSliderb(BView* view, bool descendants)
+{
+	perform_data_layout_invalidated data;
+	data.descendants = descendants;
+
+	view->Perform(PERFORM_CODE_LAYOUT_INVALIDATED, &data);
+}
+
 #endif	// __GNUC__ < 3