git: openjdk/jdk22u: master: 8327391: Add SipHash attribution file

[Jesper Wilhelmsson]

Changeset: 6ac93265
Author:    Jesper Wilhelmsson <jwilhelm at openjdk.org>
Date:      2024-03-07 14:32:26 +0000
URL:       https://git.openjdk.org/jdk22u/commit/6ac9326537db8a067dfaa21d9cef104a43ed693e

8327391: Add SipHash attribution file

Backport-of: fcf48ab3d36a7f8eed84e81c3e2445adcbc95374

+ src/hotspot/share/legal/siphash.md