RFR: 8353946: Incorrect WINDOWS ifdef in os::build_agent_function_name

[Kim Barrett]

On Tue, 15 Apr 2025 00:50:16 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Trivial fix to add missing underscore: WINDOWS -> _WINDOWS
> 
> When the original code was combined into a shared version, the ifdef around this windows-specific part was incorrect.
> 
> Testing: sanity builds only. Correctness is by inspection.
> 
> There are no tests for static agents that would exercise this code path.
> 
> Thanks.

Looks good.

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Marked as reviewed by kbarrett (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24641#pullrequestreview-2766243679