Update year in copyright text to 2014

Change-Id: Ic7fb61aabae1d515b9e6baf3dd003807ff42da60
diff --git a/lib/stdlib/strlen.c b/lib/stdlib/strlen.c
index a388fe4..23c3d39 100644
--- a/lib/stdlib/strlen.c
+++ b/lib/stdlib/strlen.c
@@ -28,7 +28,7 @@
  */
 
 /*
- * Portions copyright (c) 2009-2013, ARM Limited and Contributors. All rights reserved.
+ * Portions copyright (c) 2009-2014, ARM Limited and Contributors. All rights reserved.
  */
 
 #include <stddef.h>