[gnome-builder] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 7d138a90e380a318bdb919fd249a8ea409f5cbb9
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Thu Oct 4 21:34:11 2018 +0200

    Update POTFILES.in

 po/POTFILES.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index ac76df9d8..3ea3e7ea3 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -180,6 +180,7 @@ src/plugins/git/ide-git-clone-widget.ui
 src/plugins/git/ide-git-genesis-addin.c
 src/plugins/git/ide-git-pipeline-addin.c
 src/plugins/git/ide-git-remote-callbacks.c
+src/plugins/git/ide-git-submodule-stage.c
 src/plugins/git/ide-git-vcs.c
 src/plugins/gnome-code-assistance/ide-gca-diagnostic-provider.c
 src/plugins/gnome-code-assistance/ide-gca-preferences-addin.c