RFR: 8284689: ProblemList java/lang/Integer/Unsigned.java in -Xcomp mode

[Daniel D.Daugherty]

A trivial fix to ProblemList java/lang/Integer/Unsigned.java in -Xcomp mode.

We already have more than 20 sightings of this failure in the CI.

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Commit messages:
 - 8284689: ProblemList java/lang/Integer/Unsigned.java in -Xcomp mode

Changes: https://git.openjdk.java.net/jdk/pull/8184/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8184&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8284689
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8184.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8184/head:pull/8184

PR: https://git.openjdk.java.net/jdk/pull/8184