RFR: JDK-8318415: Adjust describing comment of os_getChildren after 8315026

[Roger Riggs]

On Wed, 18 Oct 2023 08:18:47 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> 8315026 adjusted and improved the describings comments already for AIX/Linux. But macOS was not adjusted.

Thanks for the updates.

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Marked as reviewed by rriggs (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/16236#pullrequestreview-1685133266