Make Qhide declaration non-target-specific

* src/xfns.c (syms_of_xfns): Move DEFSYM from here...
* src/menu.c (syms_of_menu): ... to here.
This fixes the NS build after dd7d966eb4.

src/menu.c

@@ -1579,6 +1579,8 @@ syms_of_menu (void)
   menu_items = Qnil;
   staticpro (&menu_items);
 
+  DEFSYM (Qhide, "hide");
+
   defsubr (&Sx_popup_menu);
   defsubr (&Sx_popup_dialog);
   defsubr (&Smenu_bar_menu_at_x_y);

src/xfns.c

@@ -7836,7 +7836,6 @@ syms_of_xfns (void)
   DEFSYM (Qfont_parameter, "font-parameter");
   DEFSYM (Qmono, "mono");
   DEFSYM (Qassq_delete_all, "assq-delete-all");
-  DEFSYM (Qhide, "hide");
   DEFSYM (Qresize_mode, "resize-mode");
 
 #ifdef USE_CAIRO