RFR: 8312164: Refactor Arrays.hashCode for long, boolean, and Object arrays [v3]

[Pavel Rappo]

> Please review this PR to refactor Arrays.hashCode for long[], boolean[], and Object[]. I've been told elsewhere that it shouldn't have significant performance implications.

Pavel Rappo has updated the pull request incrementally with one additional commit since the last revision:

  Fix hashCode(float[])

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14900/files
  - new: https://git.openjdk.org/jdk/pull/14900/files/81d0f0b1..92d09473

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14900&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14900&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14900.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14900/head:pull/14900

PR: https://git.openjdk.org/jdk/pull/14900