[jdk17u-dev] RFR: 8288003: log events for os::dll_unload

[Matthias Baesken]

8288003: log events for os::dll_unload

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Commit messages:
 - Backport c2ccf4ca85b5375e08dce836acd6e86c851c3bd6

Changes: https://git.openjdk.org/jdk17u-dev/pull/556/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=556&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288003
  Stats: 46 lines in 4 files changed: 43 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/556.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/556/head:pull/556

PR: https://git.openjdk.org/jdk17u-dev/pull/556