RFR: 8331427: Rename confusingly named ArraysSupport.signedHashCode [v2]

[Pavel Rappo]

> Please review this trivial method rename. While this issue was originally spotted in [another PR], it makes sense to address it separately. Test results are pending; not that I expect failures, but still.
> 
> [another PR]: https://github.com/openjdk/jdk/pull/14831#issuecomment-1655477396

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

  Update copyright years
  
  Note: any commit hashes below might be outdated due to subsequent
  history rewriting (e.g. git rebase).
  
   + update src/java.base/share/classes/jdk/internal/util/ArraysSupport.java due to e83c991fb5d

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19023/files
  - new: https://git.openjdk.org/jdk/pull/19023/files/e83c991f..69f56778

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19023&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19023&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19023.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19023/head:pull/19023

PR: https://git.openjdk.org/jdk/pull/19023