RFR: 7903257: jextract should generate javadoc comments [v3]

[Athijegannathan Sundararajan]

> Generating C signature as doc comments.

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

  defensive code to avoid possible crashes in doc generation

-------------

Changes:
  - all: https://git.openjdk.org/jextract/pull/85/files
  - new: https://git.openjdk.org/jextract/pull/85/files/deb57bf1..fab2ddb7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jextract&pr=85&range=02
 - incr: https://webrevs.openjdk.org/?repo=jextract&pr=85&range=01-02

  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jextract/pull/85.diff
  Fetch: git fetch https://git.openjdk.org/jextract pull/85/head:pull/85

PR: https://git.openjdk.org/jextract/pull/85