RFR: 8360474: Add missing include guards for some HotSpot headers

[David Holmes]

On Wed, 25 Jun 2025 06:44:31 GMT, Qizheng Xing <qxing at openjdk.org> wrote:

> Some HotSpot header files are missing include guards, which may cause compilation errors if these files are included multiple times. This patch adds include guards for them.

That looks fine to me.

Thanks

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Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/25968#pullrequestreview-2956923970