[gnome-software] Add <project_license> to the AppData file

[Richard Hughes <rhughes src gnome org>]

commit 5a791d5a1b9edc06a457f3b4f1893bb2a407d265
Author: Richard Hughes <richard hughsie com>
Date:   Fri May 2 14:32:13 2014 +0100

    Add <project_license> to the AppData file

 data/appdata/org.gnome.Software.appdata.xml.in |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/data/appdata/org.gnome.Software.appdata.xml.in b/data/appdata/org.gnome.Software.appdata.xml.in
index a10f86b..1a5e145 100644
--- a/data/appdata/org.gnome.Software.appdata.xml.in
+++ b/data/appdata/org.gnome.Software.appdata.xml.in
@@ -2,7 +2,8 @@
 <!-- Copyright 2013 Richard Hughes <richard hughsie com> -->
 <application>
   <id type="desktop">org.gnome.Software.desktop</id>
-  <licence>CC0</licence>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-2.0+</project_license>
   <_summary>Application manager for GNOME</_summary>
   <description>
     <_p>