time: run genzabbrs.go to update zoneinfo_abbrs_windows.go

Last time zoneinfo_abbrs_windows.go was updated in CL 27832.
Time for another update.

Change-Id: I8dc3a1de6f22e90e634b2176188f257a260b6463
Reviewed-on: https://go-review.googlesource.com/45450Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/time/genzabbrs.go

@@ -142,8 +142,8 @@ const prog = `
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// generated by genzabbrs.go from
-// {{.URL}}
+// Code generated by genzabbrs.go; DO NOT EDIT.
+// Based on information from {{.URL}}
 
 package time