RFR: 7904073: Derive required symbols from client code to minimize generated bindings [v2]

[Nizar Benalla]

> Please review this change to add a small sample that extracts full bindings once, scans the compiled client classes to collect actually referenced symbols, filters the includes list, and re-runs jextract to produce a slim binding set.

Nizar Benalla has updated the pull request incrementally with one additional commit since the last revision:

  remove unsued file.
  Use `*argv` as second argument of glutInit

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Changes:
  - all: https://git.openjdk.org/jextract/pull/288/files
  - new: https://git.openjdk.org/jextract/pull/288/files/4c4e6dd2..63ca2beb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jextract&pr=288&range=01
 - incr: https://webrevs.openjdk.org/?repo=jextract&pr=288&range=00-01

  Stats: 15 lines in 3 files changed: 2 ins; 10 del; 3 mod
  Patch: https://git.openjdk.org/jextract/pull/288.diff
  Fetch: git fetch https://git.openjdk.org/jextract.git pull/288/head:pull/288

PR: https://git.openjdk.org/jextract/pull/288