layout: Keep kind metadata in loaded layouts

It will come useful for applying per-kind styling later without having to give each layout a new stylesheet

eek/eek-xml-layout.c

@@ -32,7 +32,7 @@
 LevelKeyboard *
 eek_xml_layout_real_create_keyboard (const char *keyboard_type,
                                      EekboardContextService *manager,
-                                     enum layout_type t)
+                                     enum squeek_arrangement_kind t)
 {
     struct squeek_layout *layout = squeek_load_layout(keyboard_type, t);
     squeek_layout_place_contents(layout);