RFR: 8368674: Incremental builds keep rebuilding interim jmod

[Christian Stein]

On Thu, 25 Sep 2025 13:51:45 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> After [JDK-8366899](https://bugs.openjdk.org/browse/JDK-8366899), the interim jmods will be constantly rebuilt during incremental builds, triggering a cascade that ends with the entire JDK image being rebuilt.

Looks good to me; a local test without changes showed no more rebuilds.

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Marked as reviewed by cstein (Committer).

PR Review: https://git.openjdk.org/jdk/pull/27490#pullrequestreview-3268066466