ob-lilypond.el: fix the copyright years.

lisp/ob-lilypond.el

@@ -1,6 +1,6 @@
 ;;; ob-lilypond.el --- org-babel functions for lilypond evaluation
 
-;; Copyright (C) 2010  Free Software Foundation, Inc.
+;; Copyright (C) 2010-2011  Free Software Foundation, Inc.
 
 ;; Author: Martyn Jago
 ;; Keywords: babel language, literate programming