[mutter] Update POTFILES.skip

[Piotr Drąg <piotrdrag src gnome org>]

commit be259117f591c28ba398203259fe227b9b30ecfb
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Wed Jan 30 17:29:03 2019 +0100

    Update POTFILES.skip

 po/POTFILES.skip | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index 03007e98c..8ff60630c 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -30,6 +30,7 @@ clutter/clutter/clutter-input-device.c
 clutter/clutter/clutter-input-device-tool.c
 clutter/clutter/clutter-input-method.c
 clutter/clutter/clutter-interval.c
+clutter/clutter/clutter-keymap.c
 clutter/clutter/clutter-layout-manager.c
 clutter/clutter/clutter-layout-meta.c
 clutter/clutter/clutter-main.c