elm: object_item: add guards to include eo and legacy header only when allowed

Make sure the eo and legacy headers are only included when the matching defines
are enabled.

src/lib/elementary/elm_object_item.h

@@ -21,8 +21,12 @@ typedef Eo Elm_Object_Item;
  */
 typedef void                  (*Elm_Object_Item_Signal_Cb)(void *data, Elm_Object_Item *it, const char *emission, const char *source);
 
+#ifdef EFL_EO_API_SUPPORT
 #include "elm_widget_item.eo.h"
+#endif
+#ifndef EFL_NOLEGACY_API_SUPPORT
 #include "elm_widget_item.eo.legacy.h"
+#endif
 
 #define elm_object_item_content_set(it, content) elm_object_item_part_content_set((it), NULL, (content))