RFR: 8361198: [AIX] fix misleading error output in thread_cpu_time_unchecked [v2]

[Martin Doerr]

On Thu, 3 Jul 2025 07:55:20 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> Currently we have on AIX in thread_cpu_time_unchecked misleading error output in case of failing getthrds64 . This should be adjusted .
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   pthread_getthrds_np failures - output errno too

Marked as reviewed by mdoerr (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/26070#pullrequestreview-2982502089