[jdk11u] RFR: 8327391: Add SipHash attribution file

[Goetz Lindenmaier]

I backport this for parity with 11.0.23-oracle.

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Commit messages:
 - Backport fcf48ab3d36a7f8eed84e81c3e2445adcbc95374

Changes: https://git.openjdk.org/jdk11u/pull/90/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u&pr=90&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327391
  Stats: 150 lines in 1 file changed: 150 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u/pull/90.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u.git pull/90/head:pull/90

PR: https://git.openjdk.org/jdk11u/pull/90