RFR: 8276927: [PPC64] Port shenandoahgc to linux on ppc64le

[Magnus Ihse Bursie]

On Wed, 10 Nov 2021 09:00:04 GMT, Niklas Radomski <nradomski at openjdk.org> wrote:

> Port the Shenandoah garbage collector (JDK-8241457)[https://bugs.openjdk.java.net/browse/JDK-8241457] to linux on ppc64le.

Build changes look good. Actual code changes needs to be reviewed by someone more knowledgable about this area.

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Marked as reviewed by ihse (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6325