RFR: 8328812: Update and move siphash license

[Kim Barrett]

On Sun, 24 Mar 2024 17:24:49 GMT, Bernd <duke at openjdk.org> wrote:

>> Updated and moved the license file.
>
> src/hotspot/share/legal/siphash.md line 9:
> 
>> 7:    Copyright (c) 2012-2021 Jean-Philippe Aumasson
>> 8:    <jeanphilippe.aumasson at gmail.com>
>> 9:    Copyright (c) 2012-2014 Daniel J. Bernstein <djb at cr.yp.to>
> 
> Why would you remove a author or year range?

To match the license claim in the code we are using:
https://github.com/openjdk/jdk/blob/fb8f2a0a929ebe7f65c69741712b89bbb403ade9/src/hotspot/share/classfile/altHashing.cpp#L32-L43

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PR Review Comment: https://git.openjdk.org/jdk/pull/18455#discussion_r1538171151