Update ICU to 58.1

source/data/zone/gsw.txt

Index: source/data/zone/gsw.txt
diff --git a/source/data/zone/gsw.txt b/source/data/zone/gsw.txt
index d8b2ae4f91b81b2686dfe16ddd37f57ad23a54a6..060e64d8acd747a5a45cddfd3bdb88de911c0d0f 100644
--- a/source/data/zone/gsw.txt
+++ b/source/data/zone/gsw.txt
@@ -1,13 +1,7 @@
-// ***************************************************************************
-// *
-// * Copyright (C) 2015 International Business Machines
-// * Corporation and others. All Rights Reserved.
-// * Tool: org.unicode.cldr.icu.NewLdml2IcuConverter
-// * Source File: <path>/common/main/gsw.xml
-// *
-// ***************************************************************************
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html#License
 gsw{
-    Version{"2.1.19.74"}
+    Version{"2.1.28.76"}
     zoneStrings{
         "Africa:Accra"{
             ec{"Akkra"}