[mutter] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit e98f1682bdf92846d4ced8c765a2316f69e43edd
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Jul 18 17:06:27 2021 +0200

    Update POTFILES.in

 po/POTFILES.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 393dd5e077..f51e98dd0a 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -11,13 +11,14 @@ src/backends/meta-input-settings.c
 src/backends/meta-monitor.c
 src/backends/meta-monitor-manager.c
 src/backends/meta-profiler.c
+src/backends/x11/meta-clutter-backend-x11.c
 src/compositor/compositor.c
 src/compositor/meta-background.c
 src/core/bell.c
 src/core/display.c
 src/core/keybindings.c
-src/core/main.c
 src/core/meta-close-dialog-default.c
+src/core/meta-context-main.c
 src/core/meta-pad-action-mapper.c
 src/core/mutter.c
 src/core/prefs.c