RFR: 8260860: ProblemList tools/jlink/plugins/CompressorPluginTest.java

[Daniel D.Daugherty]

A trivial fix to put tools/jlink/plugins/CompressorPluginTest.java back on the
ProblemList. It was removed in error (see the bug for the details).

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Commit messages:
 - 8260860: ProblemList tools/jlink/plugins/CompressorPluginTest.java

Changes: https://git.openjdk.java.net/jdk/pull/2341/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2341&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260860
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2341.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2341/head:pull/2341

PR: https://git.openjdk.java.net/jdk/pull/2341