[foreign-memaccess+abi] RFR: Fix so that heap segments work [v2]

Mon Aug 7 16:16:06 UTC 2023

On Mon, 7 Aug 2023 16:11:04 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> This PR fixes converting heap segments to strings.
>
> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix after comments

Marked as reviewed by jvernee (Committer).

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PR Review: https://git.openjdk.org/panama-foreign/pull/858#pullrequestreview-1565704667