RFR: 8361183: JDK-8360887 needs fixes to avoid cycles and better tests (aix)

[Martin Doerr]

Follow-up for https://github.com/openjdk/jdk/pull/26021. See latest comments there.

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Commit messages:
 - 8361183: JDK-8360887 needs fixes to avoid cycles and better tests (aix)

Changes: https://git.openjdk.org/jdk/pull/26066/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26066&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361183
  Stats: 34 lines in 2 files changed: 13 ins; 10 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/26066.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26066/head:pull/26066

PR: https://git.openjdk.org/jdk/pull/26066