[jdk11u-dev] RFR: 8248667: Need support for building native libraries located in the test/lib directory

[Andrew Lu]

Backport for JDK-8248194 and JDK-8248667

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Commit messages:
 - Backport 1356a0f1ac06b006a20ca9fa2306ef60aef5c16e

Changes: https://git.openjdk.org/jdk11u-dev/pull/2580/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2580&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8248667
  Stats: 638 lines in 10 files changed: 463 ins; 137 del; 38 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2580.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2580/head:pull/2580

PR: https://git.openjdk.org/jdk11u-dev/pull/2580