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

[Richard Hughes <rhughes src gnome org>]

commit 3abbfcc002e34b3ce9b0dbc94beea6a47a945d5d
Author: Richard Hughes <richard hughsie com>
Date:   Fri May 2 14:33:43 2014 +0100

    Add <project_license> to the AppData file

 data/appdata/gpk-application.appdata.xml.in   |    3 ++-
 data/appdata/gpk-update-viewer.appdata.xml.in |    3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/data/appdata/gpk-application.appdata.xml.in b/data/appdata/gpk-application.appdata.xml.in
index 1fb025a..b897579 100644
--- a/data/appdata/gpk-application.appdata.xml.in
+++ b/data/appdata/gpk-application.appdata.xml.in
@@ -2,7 +2,8 @@
 <!-- Copyright 2013 Richard Hughes <richard hughsie com> -->
 <application>
   <id type="desktop">gpk-application.desktop</id>
-  <licence>CC0</licence>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-2.0+</project_license>
   <_name>GNOME Packages</_name>
   <description>
     <_p>
diff --git a/data/appdata/gpk-update-viewer.appdata.xml.in b/data/appdata/gpk-update-viewer.appdata.xml.in
index 1c8b6dc..c7b2ebc 100644
--- a/data/appdata/gpk-update-viewer.appdata.xml.in
+++ b/data/appdata/gpk-update-viewer.appdata.xml.in
@@ -2,7 +2,8 @@
 <!-- Copyright 2013 Richard Hughes <richard hughsie com> -->
 <application>
   <id type="desktop">gpk-update-viewer.desktop</id>
-  <licence>CC0</licence>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-2.0+</project_license>
   <_name>GNOME Package Updater</_name>
   <description>
     <_p>