RFR: 8254789: ProblemList compiler/graalunit/HotspotTest.java

[Daniel D.Daugherty]

This is a trivial change to ProblemList compiler/graalunit/HotspotTest.java.

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Commit messages:
 - 8254789: ProblemList compiler/graalunit/HotspotTest.java

Changes: https://git.openjdk.java.net/jdk/pull/666/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=666&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8254789
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/666.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/666/head:pull/666

PR: https://git.openjdk.java.net/jdk/pull/666