[gnome-games] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit a2d28c0b9584317353e29c3a6c917f7e1a0c2ef1
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Fri May 17 22:05:20 2019 +0200

    Update POTFILES.in

 po/POTFILES.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 1133ae05..aef749b9 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -12,6 +12,7 @@ data/ui/gamepad-mapper.ui
 data/ui/input-mode-switcher.ui
 data/ui/keyboard-mapper.ui
 data/ui/media-menu-button.ui
+data/ui/preferences-page-backup-restore.ui
 data/ui/preferences-page-controllers.ui
 data/ui/preferences-page-video.ui
 data/ui/preferences-subpage-gamepad.ui