RFR: 8365543: UnixNativeDispatcher.init should lookup open64at and stat64at on AIX

[Goetz Lindenmaier]

On Fri, 15 Aug 2025 06:58:35 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> Java_sun_nio_fs_UnixNativeDispatcher_init currently misses to set the correct OS functions for my_openat_func and my_fstatat_func on AIX ; this should be adjusted.

Impressive subtle difference in function names. Looks good.
Thanks for cleaning up the #ifdefs along with this.

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Marked as reviewed by goetz (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26793#pullrequestreview-3123207200