Update the copyright coredits -- Happy new year 2013!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171342 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/LICENSE.TXT b/LICENSE.TXT
index 6c224f8..e31223a 100644
--- a/LICENSE.TXT
+++ b/LICENSE.TXT
@@ -4,7 +4,7 @@
 University of Illinois/NCSA
 Open Source License
 
-Copyright (c) 2007-2012 University of Illinois at Urbana-Champaign.
+Copyright (c) 2007-2013 University of Illinois at Urbana-Champaign.
 All rights reserved.
 
 Developed by: