RFR: 8254696: safepointMechanism_aix needs adaptation for JDK-8253180

[David Holmes]

On Tue, 13 Oct 2020 14:09:33 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> JDK-8253180 changed SafepointMechanism::default_initialize(). SafepointMechanism::pd_initialize() in
> safepointMechanism_aix.cpp needs the same changes in order to fix build and initialization.

Looks to be consistent with JDK-8253180 changes.

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/635