Update copyright dates.

svn path=/trunk/yasm/; revision=2188
diff --git a/COPYING b/COPYING
index 15265bc..e5d99e2 100644
--- a/COPYING
+++ b/COPYING
@@ -1,4 +1,4 @@
-Yasm is Copyright (c) 2001-2008 Peter Johnson and other Yasm developers.
+Yasm is Copyright (c) 2001-2009 Peter Johnson and other Yasm developers.
 
 Yasm developers and/or contributors include:
   Peter Johnson