[gnome-builder] build: update POTFILES.in

[Christian Hergert <chergert src gnome org>]

commit 7010cf0b80843425e3b2a3b821e0d31dc331f5a3
Author: Christian Hergert <christian hergert me>
Date:   Fri May 1 15:19:09 2015 -0700

    build: 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 ac50d4a..d696c0e 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -97,6 +97,7 @@ libide/python/ide-python-format-provider.c
 libide/tasks/ide-load-directory-task.c
 libide/theatrics/ide-animation.c
 libide/theatrics/ide-box-theatric.c
+contrib/egg/egg-signal-group.c
 contrib/search/trie.c
 src/app/gb-application-actions.c
 src/app/gb-application.c