JDK 14 RFR of JDK-8230373: Use java.io.Serial in generated exception types

[Joe Darcy]

Hello,

As noted during the code review of JDK-8229997 
(http://mail.openjdk.java.net/pipermail/core-libs-dev/2019-August/062049.html), 
for completeness @java.io.Serial annotation should be included on 
generated exception types.

Please review the patch below which adds these annotations by updating 
the generation script.

Thanks,

-Joe

diff -r 374f3f9dda6f make/scripts/genExceptions.sh
--- a/make/scripts/genExceptions.sh    Fri Aug 30 14:58:40 2019 -0400
+++ b/make/scripts/genExceptions.sh    Fri Aug 30 13:10:30 2019 -0700
@@ -1,6 +1,6 @@
  #! /bin/sh
  #
-# Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights 
reserved.
+# Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights 
reserved.
  # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  #
  # This code is free software; you can redistribute it and/or modify it
@@ -60,6 +60,7 @@
      extends ${SUPER}
  {

+    @java.io.Serial
      private static final long serialVersionUID = $SVUID;
  __END__