toytoolkit: Expose output make and model

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
diff --git a/clients/window.h b/clients/window.h
index 38d574f..0a113fc 100644
--- a/clients/window.h
+++ b/clients/window.h
@@ -602,6 +602,12 @@
 uint32_t
 output_get_scale(struct output *output);
 
+const char *
+output_get_make(struct output *output);
+
+const char *
+output_get_model(struct output *output);
+
 void
 keysym_modifiers_add(struct wl_array *modifiers_map,
 		     const char *name);