Fix old macOS build.

Even the "new" macOS build bots (running 10.13) with my attempted
LC_ALL=C workaround are failing to build the new GNU Make.

  sed: RE error: illegal byte sequence

The error is because of the 'ä' in "Klaus Kämpf", so as a workaround
let's just mangle that into ASCII for now.

Bug: http://b/153310680
Test: suck it and see
Change-Id: I973e0a29c10a129062dff8d902ac4322ba90f561
diff --git a/src/config.h-vms.template b/src/config.h-vms.template
index 7cd393d..babce6d 100644
--- a/src/config.h-vms.template
+++ b/src/config.h-vms.template
@@ -1,4 +1,4 @@
-/* config.h-vms. Generated by hand by Klaus Kämpf <>      -*-C-*-
+/* config.h-vms. Generated by hand by Klaus Kaempf <>      -*-C-*-
 Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.