Update ICU to 58.1

source/data/locales/gv.txt

Index: source/data/locales/gv.txt
diff --git a/source/data/locales/gv.txt b/source/data/locales/gv.txt
index 44e5a382a4f5abd1ca0ac279308fb63522fa822d..d31f28bfd8cff55c0786c0f2b2b27e0268fdb598 100644
--- a/source/data/locales/gv.txt
+++ b/source/data/locales/gv.txt
@@ -1,11 +1,5 @@
-// ***************************************************************************
-// *
-// * Copyright (C) 2015 International Business Machines
-// * Corporation and others. All Rights Reserved.
-// * Tool: org.unicode.cldr.icu.NewLdml2IcuConverter
-// * Source File: <path>/common/main/gv.xml
-// *
-// ***************************************************************************
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html#License
 gv{
     ExemplarCharacters{"[a b c ç d e f g h i j k l m n o p q r s t u v w x y z]"}
     NumberElements{
@@ -15,13 +9,17 @@ gv{
             }
         }
     }
-    Version{"2.1.19.14"}
+    Version{"2.1.27.40"}
     calendar{
         gregorian{
             AmPmMarkers{
                 "a.m.",
                 "p.m.",
             }
+            AmPmMarkersAbbr{
+                "a.m.",
+                "p.m.",
+            }
             dayNames{
                 format{
                     abbreviated{