[gimp] app: add missing file to last commit

[Ell <ell src gnome org>]

commit 3a8725a40918f065298b2787fca804162af1d732
Author: Ell <ell_se yahoo com>
Date:   Wed Feb 5 01:18:52 2020 +0200

    app: add missing file to last commit

 app/core/gimptoolinfo.h | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/app/core/gimptoolinfo.h b/app/core/gimptoolinfo.h
index 0d54fc3486..fc028b72bf 100644
--- a/app/core/gimptoolinfo.h
+++ b/app/core/gimptoolinfo.h
@@ -52,6 +52,7 @@ struct _GimpToolInfo
   gchar               *help_id;
 
   gboolean             hidden;
+  gboolean             experimental;
 
   GimpToolOptions     *tool_options;
   GimpPaintInfo       *paint_info;