[jdk11u-dev] RFR: 8252401: Introduce Utils.TEST_NATIVE_PATH

[Goetz Lindenmaier]

I backport this for parity with 11.0.19-oracle.

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Commit messages:
 - Backport e1d29cd6fb4a9d1ccf2105840e54593a6c3e5c7c

Changes: https://git.openjdk.org/jdk11u-dev/pull/1750/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1750&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8252401
  Stats: 6 lines in 1 file changed: 5 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1750.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1750/head:pull/1750

PR: https://git.openjdk.org/jdk11u-dev/pull/1750