RFR: 8256803: ProblemList runtime/ReservedStack/ReservedStackTestCompiler.java on linux-aarch64

[Daniel D.Daugherty]

A trivial fix to ProblemList runtime/ReservedStack/ReservedStackTestCompiler.java on linux-aarch64.

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Commit messages:
 - 8256803: ProblemList runtime/ReservedStack/ReservedStackTestCompiler.java on linux-aarch64

Changes: https://git.openjdk.java.net/jdk/pull/1356/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1356&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256803
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1356.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1356/head:pull/1356

PR: https://git.openjdk.java.net/jdk/pull/1356