RFR: 7903285: jextract should skip static symbols [v3]

[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:

  fixed test

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Changes:
  - all: https://git.openjdk.org/jextract/pull/70/files
  - new: https://git.openjdk.org/jextract/pull/70/files/df32c567..f46f4aa0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jextract&pr=70&range=02
 - incr: https://webrevs.openjdk.org/?repo=jextract&pr=70&range=01-02

  Stats: 7 lines in 2 files changed: 4 ins; 0 del; 3 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