[rhythmbox] ignore .appdata.xml

[Jonathan Matthew <jmatthew src gnome org>]

commit b1e082fda7ab63bc488043a2ddbd035762966921
Author: Jonathan Matthew <jonathan d14n org>
Date:   Tue Dec 23 18:47:41 2014 +1000

    ignore .appdata.xml

 .gitignore |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index e90b5ec..9eafac9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -146,3 +146,5 @@ widgets/test-uri-dialog
 
 plugins/audiocd/test-cd
 plugins/rb/rbconfig.py
+
+data/rhythmbox.appdata.xml