RFR: 8280898: ProblemList compiler/regalloc/TestC2IntPressure.java on macosx-aarch64

[Daniel D.Daugherty]

A trivial fix to ProblemList compiler/regalloc/TestC2IntPressure.java on macosx-aarch64.

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Commit messages:
 - 8280898: ProblemList compiler/regalloc/TestC2IntPressure.java on macosx-aarch64

Changes: https://git.openjdk.java.net/jdk/pull/7272/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7272&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8280898
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7272.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7272/head:pull/7272

PR: https://git.openjdk.java.net/jdk/pull/7272