[foreign-jextract] [Rev 01] RFR: 8245066: struct/union/array address accessor should be x$ADDR() for consistency

[Athijegannathan Sundararajan]

> * renamed struct/union/array accessor as x$ADDR
> * Piggybacking to add a jextract based test for bug 8244938

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

  added missing EXPORT for exported function

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

Changes:
  - all: https://git.openjdk.java.net/panama-foreign/pull/166/files
  - new: https://git.openjdk.java.net/panama-foreign/pull/166/files/8b801e3b..8cabdce3

Webrevs:
 - full: https://webrevs.openjdk.java.net/panama-foreign/166/webrev.01
 - incr: https://webrevs.openjdk.java.net/panama-foreign/166/webrev.00-01

  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/166.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/166/head:pull/166

PR: https://git.openjdk.java.net/panama-foreign/pull/166