[gnome-software] Add a missing tag to the AppData file

[Richard Hughes <rhughes src gnome org>]

commit 1d707bde76e87deeed05077c2a5dcc2b6d7508e4
Author: Richard Hughes <richard hughsie com>
Date:   Mon Jan 25 13:06:25 2016 +0000

    Add a missing tag to the AppData file

 data/appdata/org.gnome.Software.appdata.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/appdata/org.gnome.Software.appdata.xml.in b/data/appdata/org.gnome.Software.appdata.xml.in
index 48309ab..e678614 100644
--- a/data/appdata/org.gnome.Software.appdata.xml.in
+++ b/data/appdata/org.gnome.Software.appdata.xml.in
@@ -311,4 +311,5 @@
   <url type="homepage">https://wiki.gnome.org/Design/Apps/Software</url>
   <update_contact>richard_at_hughsie.com</update_contact>
   <compulsory_for_desktop>GNOME</compulsory_for_desktop>
+  <project_group>GNOME</project_group>
 </component>