[gparted] Update GParted appdata file (#12)

[Curtis Gedak <gedakc src gnome org>]

commit c9de37c9df871e31e46f3040e3c8724e31534927
Author: Curtis Gedak <gedakc gmail com>
Date:   Mon Oct 8 09:53:58 2018 -0600

    Update GParted appdata file (#12)
    
    Closes #12 - Appstream metadata needs valid license

 gparted.appdata.xml.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gparted.appdata.xml.in b/gparted.appdata.xml.in
index 1678e562..777a4231 100644
--- a/gparted.appdata.xml.in
+++ b/gparted.appdata.xml.in
@@ -2,7 +2,7 @@
 <!-- Copyright 2013 Curtis Gedak <gedakc users sf net> -->
 <component type="desktop">
   <id>gparted.desktop</id>
-  <metadata_license>CC0-1.0</metadata_license>
+  <metadata_license>GFDL-1.3</metadata_license>
   <project_license>GPL-2.0+</project_license>
   <_name>GParted Partition Editor</_name>
   <_summary>Create, reorganize, and delete partitions</_summary>