[crac] RFR: Fix a #73 reference regression

[Jan Kratochvil]

It fixes:
- test/jdk/java/lang/ClassLoader/loadLibraryUnload/LoadLibraryUnloadTest.java
- test/jdk/java/lang/ClassLoader/nativeLibrary/NativeLibraryTest.java
- test/jdk/java/lang/ref/CleanerTest.java
@rvansa the author of #73 should know more.

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Commit messages:
 - Fix a PR 73 references regression

Changes: https://git.openjdk.org/crac/pull/108/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=108&range=00
  Stats: 11 lines in 3 files changed: 0 ins; 10 del; 1 mod
  Patch: https://git.openjdk.org/crac/pull/108.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/108/head:pull/108

PR: https://git.openjdk.org/crac/pull/108