[foreign-memaccess+abi] RFR: Add benchmark [v3]

[Maurizio Cimadamore]

On Mon, 19 Dec 2022 11:59:44 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> This PR proposed to add a new benchmark outlining potential performance gains with the FFM API in internal JDK classes.
>
> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add case for singel invocation

Marked as reviewed by mcimadamore (Committer).

-------------

PR: https://git.openjdk.org/panama-foreign/pull/761