RFR: 7903285: jextract should skip static symbols [v4]

[Athijegannathan Sundararajan]

> Cursor linkage kind CXLinkage_Internal is used for static variables and static functions. Filtering the cursors with that linkage kind. Most of the changes are due to regenerated clang bindings to include clang_getCursorLinkage and CXLinkageKind enum constants.

Athijegannathan Sundararajan has updated the pull request incrementally with one additional commit since the last revision:

  filtering inline non-static functions as well. expanded the test.

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Changes:
  - all: https://git.openjdk.org/jextract/pull/70/files
  - new: https://git.openjdk.org/jextract/pull/70/files/f46f4aa0..6efe9c43

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jextract&pr=70&range=03
 - incr: https://webrevs.openjdk.org/?repo=jextract&pr=70&range=02-03

  Stats: 240 lines in 16 files changed: 129 ins; 95 del; 16 mod
  Patch: https://git.openjdk.org/jextract/pull/70.diff
  Fetch: git fetch https://git.openjdk.org/jextract pull/70/head:pull/70

PR: https://git.openjdk.org/jextract/pull/70