RFR: JDK-8324753: [AIX] adjust os_posix after JDK-8318696

[Matthias Baesken]

On Fri, 26 Jan 2024 13:29:15 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> [JDK-8318696](https://bugs.openjdk.org/browse/JDK-8318696) changed not only Linux related os coding, but also os_posix.
> Unfortunately, this touches AIX as well, we use there now the non-large-file functions (e.g. lseek) which could be problematic.
> See also https://www.ibm.com/docs/en/aix/7.1?topic=volumes-writing-programs-that-access-large-files .

Hi Joachim and Thomas, thanks for the reviews !

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PR Comment: https://git.openjdk.org/jdk/pull/17587#issuecomment-1912178091