RFR: 8312120: GenShen: Update OLD Live at end of Previous Marking after Full GC

[Kelvin Nilsen]

On Wed, 16 Aug 2023 17:10:43 GMT, William Kemper <wkemper at openjdk.org> wrote:

> Record total live memory for old generation following Full GC marking phase.

Thanks.

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Marked as reviewed by kdnilsen (Committer).

PR Review: https://git.openjdk.org/shenandoah/pull/306#pullrequestreview-1583278005