[jdk11u-dev] RFR: 8274381: missing CAccessibility definitions in JNI code

[Martin Doerr]

Backport of JDK-8274381. Taken from 17u.

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Commit messages:
 - Backport a9981fb0ff11965128761ffd1d8fae1c44c7b9fb

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/480/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=480&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274381
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/480.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/480/head:pull/480

PR: https://git.openjdk.java.net/jdk11u-dev/pull/480