RFR: 7903335: jextract test TestSplit.java fails

Tue Sep 27 13:21:25 UTC 2022

making class final and constructors private breaks header split classes. Turning off these for split header classes.

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Commit messages:
 - 7903335: jextract test TestSplit.java fails

Changes: https://git.openjdk.org/jextract/pull/79/files
 Webrev: https://webrevs.openjdk.org/?repo=jextract&pr=79&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903335
  Stats: 12 lines in 1 file changed: 5 ins; 5 del; 2 mod
  Patch: https://git.openjdk.org/jextract/pull/79.diff
  Fetch: git fetch https://git.openjdk.org/jextract pull/79/head:pull/79

PR: https://git.openjdk.org/jextract/pull/79