[gnome-builder] meson-templates: ensure access to defines

[Christian Hergert <chergert src gnome org>]

commit 094c93d4c30de6eb8c3aa86e538c507ddf8ea6e2
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jul 18 10:17:04 2021 -0700

    meson-templates: ensure access to defines

 src/plugins/meson-templates/resources/src/main-gtk4.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/plugins/meson-templates/resources/src/main-gtk4.c 
b/src/plugins/meson-templates/resources/src/main-gtk4.c
index 5dd33a8db..833322856 100644
--- a/src/plugins/meson-templates/resources/src/main-gtk4.c
+++ b/src/plugins/meson-templates/resources/src/main-gtk4.c
@@ -1,5 +1,7 @@
 {{include "license.c"}}
 
+#include "config.h"
+
 #include <glib/gi18n.h>
 
 #include "{{prefix}}-config.h"