RFR: JDK-8328589: unify os::breakpoint among posix platforms

[Lutz Schmidt]

On Wed, 20 Mar 2024 10:16:22 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> Seems we can unify os::breakpoint among the posix platforms supported in OpenJDK.

LGTM
Nice cleanup.

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Marked as reviewed by lucy (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18395#pullrequestreview-1949094743