[gitg] appdata: add license

[Ignacio Casal Quinteiro <icq src gnome org>]

commit cfa9fb09ada63bc8b8a39e7b424b992c1c270877
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Thu Jan 21 11:48:39 2016 +0100

    appdata: add license

 data/gitg.appdata.xml |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/data/gitg.appdata.xml b/data/gitg.appdata.xml
index 39c2748..f821f55 100644
--- a/data/gitg.appdata.xml
+++ b/data/gitg.appdata.xml
@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <application>
   <id type="desktop">gitg.desktop</id>
-  <licence>CC0</licence>
+  <metadata_license>CC0</metadata_license>
+  <project_license>GPL-2.0+</project_license>
   <description>
     <p>
       gitg is a graphical user interface for git. It aims at being a small,