Update ICU to 58.1

source/i18n/zrule.h

Index: source/i18n/zrule.h
diff --git a/source/i18n/zrule.h b/source/i18n/zrule.h
index 52e90eaf1602b33b98290fede99ece19b3786f52..9b694aff0617b91b5f37e8ddd3b3df4d232539c7 100644
--- a/source/i18n/zrule.h
+++ b/source/i18n/zrule.h
@@ -1,7 +1,9 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
 *******************************************************************************
-* Copyright (C) 2009-2011, International Business Machines Corporation and         *
-* others. All Rights Reserved.                                                *
+* Copyright (C) 2009-2016, International Business Machines Corporation and
+* others. All Rights Reserved.
 *******************************************************************************
 */
 #ifndef __ZRULE_H
@@ -16,6 +18,8 @@
 
 #if !UCONFIG_NO_FORMATTING
 
+#include "unicode/uobject.h"
+
 #ifndef UCNV_H
 
 /**