[gnome-sudoku] appdata: add copyright line

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 3105477058bb7dcd440130b497cfd92714053b05
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat Oct 5 10:25:04 2013 -0500

    appdata: add copyright line

 data/gnome-sudoku.appdata.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/gnome-sudoku.appdata.xml.in b/data/gnome-sudoku.appdata.xml.in
index 6a69f8e..b835aba 100644
--- a/data/gnome-sudoku.appdata.xml.in
+++ b/data/gnome-sudoku.appdata.xml.in
@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright 2013 Michael Catanzaro and contributors -->
 <application>
 <id type="desktop">gnome-sudoku.desktop</id>
 <licence>CC0</licence>