Integrated: 8280413: ProblemList jdk/jfr/event/oldobject/TestLargeRootSet.java on all X64 platforms

[Daniel D.Daugherty]

A trivial fix to ProblemList jdk/jfr/event/oldobject/TestLargeRootSet.java on all X64 platforms.

-------------

Commit messages:
 - 8280413: ProblemList jdk/jfr/event/oldobject/TestLargeRootSet.java on all X64 platforms

Changes: https://git.openjdk.java.net/jdk/pull/7168/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7168&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8280413
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7168.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7168/head:pull/7168

PR: https://git.openjdk.java.net/jdk/pull/7168