[foreign-memaccess+abi] RFR: Address failures in jdk.incubator.foreign benchmarks [v4]

[Maurizio Cimadamore]

On Wed, 20 Oct 2021 14:01:52 GMT, Julia Boes <jboes at openjdk.org> wrote:

>> This change addresses some failures in the jdk.incubator.foreign benchmarks, mainly caused by missing casts and missing native access.
>
> Julia Boes has updated the pull request incrementally with one additional commit since the last revision:
> 
>   another copyright header fix

Marked as reviewed by mcimadamore (Committer).

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PR: https://git.openjdk.java.net/panama-foreign/pull/602