RFR: 8361216: Do not fork javac in J2DBench ant build [v2]

[Phil Race]

On Wed, 9 Jul 2025 16:00:59 GMT, Eric Caspole <ecaspole at openjdk.org> wrote:

>> Build J2DBench in ant using JAVA_HOME, not using fork to possibly pick a different javac from the PATH.
>
> Eric Caspole has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update the version default to 8 in the Make file as Phil noticed.

Marked as reviewed by prr (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/26077#pullrequestreview-3002672644