[gnome-continuous] Add back gnome-packagekit

[Javier Jardón Cabezas <jjardon src gnome org>]

commit e6afc528d7a527122df8cc26639d7acc39da8fa9
Author: Javier Jardón <jjardon gnome org>
Date:   Tue Apr 4 15:38:28 2017 +0100

    Add back gnome-packagekit

 manifest.json |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index 6322976..5bea141 100644
--- a/manifest.json
+++ b/manifest.json
@@ -852,6 +852,8 @@
                {"src": "gnome:librest",
                  "branch": "librest-0-7"},
 
+               {"src": "gnome:gnome-packagekit"},
+
                {"src": "fd-telepathy:telepathy-glib",
                 "config-opts": ["--enable-vala-bindings",
                                  "--disable-fatal-warnings"]},