RFR: 7903179: libclang bindings has to be regenerated

[Athijegannathan Sundararajan]

updating libclang generated classes and updateclang tool

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Commit messages:
 - 7903179: libclang bindings has to be regenerated

Changes: https://git.openjdk.java.net/jextract/pull/30/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jextract&pr=30&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7903179
  Stats: 528 lines in 30 files changed: 50 ins; 0 del; 478 mod
  Patch: https://git.openjdk.java.net/jextract/pull/30.diff
  Fetch: git fetch https://git.openjdk.java.net/jextract pull/30/head:pull/30

PR: https://git.openjdk.java.net/jextract/pull/30