Update ICU to 58.1

source/common/util_props.cpp

Index: source/common/util_props.cpp
diff --git a/source/common/util_props.cpp b/source/common/util_props.cpp
index 1bdaaddb71afcce1d09ada5726ca5e4b8aa3d80e..a88d5816c7a9c57dff1f2eabfa62f1ddec2a8a3b 100644
--- a/source/common/util_props.cpp
+++ b/source/common/util_props.cpp
@@ -1,6 +1,8 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
 **********************************************************************
-*   Copyright (c) 2001-2011, International Business Machines
+*   Copyright (c) 2001-2016, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 **********************************************************************
 *   Date        Name        Description
@@ -101,6 +103,7 @@ int32_t ICU_Utility::parsePattern(const UnicodeString& rule, int32_t pos, int32_
                 return -1;
             }
             // FALL THROUGH to skipWhitespace
+            U_FALLTHROUGH;
         case 126 /*'~'*/:
             pos = skipWhitespace(rule, pos);
             break;