Update the copyright credits -- Happy new year 2014!

FIXME: Dragonegg may be updated at non-trivial changes.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@198274 91177308-0d34-0410-b5e6-96231b3b80d8

LICENSE.TXT

@@ -14,7 +14,7 @@ Full text of the relevant licenses is included below.
 University of Illinois/NCSA
 Open Source License
 
-Copyright (c) 2009-2013 by the contributors listed in CREDITS.TXT
+Copyright (c) 2009-2014 by the contributors listed in CREDITS.TXT
 
 All rights reserved.
 
@@ -55,7 +55,7 @@ SOFTWARE.
 
 ==============================================================================
 
-Copyright (c) 2009-2013 by the contributors listed in CREDITS.TXT
+Copyright (c) 2009-2014 by the contributors listed in CREDITS.TXT
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal