[pitivi] build: Do not try to run app after building bundle

[Thibault Saunier <tsaunier src gnome org>]

commit 6259fe977fe7085cf52d748f5faacb9dd16bde0b
Author: Thibault Saunier <tsaunier gnome org>
Date:   Fri Aug 12 09:35:22 2016 -0400

    build: Do not try to run app after building bundle

 build/flatpak/pitivi-flatpak |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/build/flatpak/pitivi-flatpak b/build/flatpak/pitivi-flatpak
index d10f746..d8c308c 100755
--- a/build/flatpak/pitivi-flatpak
+++ b/build/flatpak/pitivi-flatpak
@@ -422,6 +422,7 @@ class PitiviFlatpak:  # pylint: disable=too-many-instance-attributes
 
         if self.bundle:
             self.update_bundle()
+            return
 
         if not self.devel:
             self.install_all()