[jdk21u] RFR: 8312180: (bf) MappedMemoryUtils passes incorrect arguments to msync (aix)

[Tyler Steele]

Hi all,

This pull request contains a backport of commit [fdac6a6a](https://github.com/openjdk/jdk/commit/fdac6a6ac871366614efe44aca58ab520766b5c8) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository. I am backporting this in order to backport [it's follow up](https://github.com/openjdk/jdk/commit/395fc78880a91eeb06a08c1abf6905d580a650c0) as well.

The commit being backported was authored by Tyler Steele on 18 Aug 2023 and was reviewed by Christoph Langer and Thomas Stuefe.

Thanks!

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Commit messages:
 - Backport fdac6a6ac871366614efe44aca58ab520766b5c8

Changes: https://git.openjdk.org/jdk21u/pull/77/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=77&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8312180
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u/pull/77.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/77/head:pull/77

PR: https://git.openjdk.org/jdk21u/pull/77