RFR: 8356266: Fix non-Shenandoah build after JDK-8356075

[Aleksey Shipilev]

On Tue, 6 May 2025 12:17:44 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> [JDK-8356075](https://bugs.openjdk.org/browse/JDK-8356075) (see PR #25001) causes builds without Shenandoah GC to fail. It's missing an `#if INCLUDE_SHENANDOAHGC`.
> 
> Testing:
>  - [x] Build without Shenandoah GC

Ah yes. Trivial.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/25064#pullrequestreview-2818264886