Update ICU to 58.1

source/i18n/decNumberLocal.h

Index: source/i18n/decNumberLocal.h
diff --git a/source/i18n/decNumberLocal.h b/source/i18n/decNumberLocal.h
index bf6d54b8b27a4c90654acee42d49cf241a1bcc63..294d5f519da6dfa91a394f1abe7bfff4496dbab1 100644
--- a/source/i18n/decNumberLocal.h
+++ b/source/i18n/decNumberLocal.h
@@ -1,7 +1,9 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /* ------------------------------------------------------------------ */
 /* decNumber package local type, tuning, and macro definitions        */
 /* ------------------------------------------------------------------ */
-/* Copyright (c) IBM Corporation, 2000-2012.   All rights reserved.   */
+/* Copyright (c) IBM Corporation, 2000-2016.   All rights reserved.   */
 /*                                                                    */
 /* This software is made available under the terms of the             */
 /* ICU License -- ICU 1.8.1 and later.                                */
@@ -29,6 +31,7 @@
 
   #include <stdlib.h>         /* for abs                              */
   #include <string.h>         /* for memset, strcpy                   */
+  #include "decContext.h"
 
   /* Conditional code flag -- set this to match hardware platform     */
   #if !defined(DECLITEND)