[mutter] Update POTFILES.skip

[Piotr Drąg <piotrdrag src gnome org>]

commit cc40a885ef28bdea769ce6a9482791f3d3dacf52
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Thu Jan 18 16:32:36 2018 +0100

    Update POTFILES.skip

 po/POTFILES.skip |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index 9d448c0..5ca3481 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -28,6 +28,7 @@ clutter/clutter/clutter-grid-layout.c
 clutter/clutter/clutter-image.c
 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-layout-manager.c
 clutter/clutter/clutter-layout-meta.c