[mutter] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 240b13aa74b23a797b2b0c0228e6320c4556ffa4
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Fri Nov 10 19:16:27 2017 +0100

    Update POTFILES.in

 po/POTFILES.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index b802335..50718bc 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -2,6 +2,7 @@
 # Please keep this file sorted alphabetically.
 data/50-mutter-navigation.xml
 data/50-mutter-system.xml
+data/50-mutter-wayland.xml
 data/50-mutter-windows.xml
 data/mutter.desktop.in
 data/org.gnome.mutter.gschema.xml.in