[gnome-builder] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit bd26bb1c5978153e6b249e37c1453f7f88f8eaf7
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Aug 11 14:19:12 2019 +0200

    Update POTFILES.in

 po/POTFILES.in | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 9fa51706e..c563b844b 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -333,7 +333,11 @@ src/plugins/retab/gbp-retab-editor-page-addin.c
 src/plugins/retab/gtk/menus.ui
 src/plugins/rustup/rustup_plugin.py
 src/plugins/shellcmd/gbp-shellcmd-command.c
+src/plugins/shellcmd/gbp-shellcmd-command-editor.c
+src/plugins/shellcmd/gbp-shellcmd-command-editor.ui
 src/plugins/shellcmd/gbp-shellcmd-command-provider.c
+src/plugins/shellcmd/gbp-shellcmd-list.c
+src/plugins/shellcmd/gbp-shellcmd-preferences-addin.c
 src/plugins/snippets/ide-snippet-completion-item.c
 src/plugins/snippets/ide-snippet-preferences-addin.c
 src/plugins/spellcheck/gbp-spell-editor-addin.c