Update ICU to 58.1

source/samples/layout/GnomeGUISupport.h

Index: source/samples/layout/GnomeGUISupport.h
diff --git a/source/samples/layout/GnomeGUISupport.h b/source/samples/layout/GnomeGUISupport.h
index e88ef128a14a67cf6cf2469531f8466ea21cc4e7..07d765a07be9eb07e441a0982a925b433fb310be 100644
--- a/source/samples/layout/GnomeGUISupport.h
+++ b/source/samples/layout/GnomeGUISupport.h
@@ -1,6 +1,12 @@
 /*
  *******************************************************************************
  *
+ *   Copyright (C) 2016 and later: Unicode, Inc. and others.
+ *   License & terms of use: http://www.unicode.org/copyright.html#License
+ *
+ *******************************************************************************
+ *******************************************************************************
+ *
  *   Copyright (C) 1999-2005, International Business Machines
  *   Corporation and others.  All Rights Reserved.
  *