RFR: 7903923: Derive C_* layouts directly from the Linker [v4]

[Maurizio Cimadamore]

On Mon, 13 Jan 2025 17:49:44 GMT, Nizar Benalla <nbenalla at openjdk.org> wrote:

>> Depending on the platform, different `C_*`  correspond to different `JAVA_*` types. We can get those values directly from the linker.
>> 
>> This patch can allows us to have a common class for different platforms.
>> 
>> Please review, and thanks in advance!
>
> Nizar Benalla has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Drop the use of JAVA_BYTE and add a small whitespace

Looks good!

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Marked as reviewed by mcimadamore (Reviewer).

PR Review: https://git.openjdk.org/jextract/pull/269#pullrequestreview-2547553789