RFR: 8366842: Update the classpath file of the graphics module

[Nir Lisker]

On Wed, 3 Sep 2025 22:14:56 GMT, Nir Lisker <nlisker at openjdk.org> wrote:

> Removed the the directories under "build" from the sources list in Eclipse since they can be platform-specific or just irrelevant for almost all cases. Contributors can add them manually as needed.
> 
> Another option is to mark them as optional.

Didn't see this in Metal. In any case, I reverted the removals and made the dependencies optional to avoid compilation errors on OS's that don't generate the required sources. This is much safer.

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PR Comment: https://git.openjdk.org/jfx/pull/1884#issuecomment-3251416265