RFR: 8361216: Do not fork javac in J2DBench ant build

[Phil Race]

On Tue, 1 Jul 2025 19:30:21 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.

and don't get confused about the ant and make stuff. The JDK build does not and is not expected to build j2dbench
It is built directly by a developer when they need to run it. 
I think the ant build was for developers who use certain IDEs.
I tend to use the make option.

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PR Comment: https://git.openjdk.org/jdk/pull/26077#issuecomment-3033274247