RFR: 7903923: Derive C_* layouts directly from the Linker

Mon Dec 30 16:23:21 UTC 2024

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!

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Commit messages:
 - derive "C" types directly from the linker

Changes: https://git.openjdk.org/jextract/pull/269/files
  Webrev: https://webrevs.openjdk.org/?repo=jextract&pr=269&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903923
  Stats: 12 lines in 1 file changed: 0 ins; 0 del; 12 mod
  Patch: https://git.openjdk.org/jextract/pull/269.diff
  Fetch: git fetch https://git.openjdk.org/jextract.git pull/269/head:pull/269

PR: https://git.openjdk.org/jextract/pull/269