RFR: 8264734: Some SA classes could use better hashCode() implementation [v3]

[Chris Plummer]

On Sun, 2 May 2021 16:07:26 GMT, Mitsuru kariya <github.com+2217224+kariya-mitsuru at openjdk.org> wrote:

>> The current `hashCode` implementation of SA's Address subclasses ignores the upper 32 bits of the long value.
>> This PR changes to use `Long.hashCode` instead.
>
> Mitsuru kariya has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add some more SA's classes

Some of the more recently changed files need updates to the Oracle copyrights. WindbgAARCH64Thread.java is a bit different in that it currently only has a 2020 date. It should be changed to the following:

` * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.`

Note I'm only requesting updates to the Oracle copyrights.

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PR: https://git.openjdk.java.net/jdk/pull/3522