RFR: 8293508: ProblemList gc/metaspace/TestMetaspacePerfCounters.java#Epsilon-64

[Daniel D. Daugherty]

A trivial fix to ProblemList gc/metaspace/TestMetaspacePerfCounters.java#Epsilon-64
on macosx-all and windows-x64.

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Commit messages:
 - 8293508: ProblemList gc/metaspace/TestMetaspacePerfCounters.java#Epsilon-64

Changes: https://git.openjdk.org/jdk/pull/10207/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10207&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293508
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/10207.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10207/head:pull/10207

PR: https://git.openjdk.org/jdk/pull/10207