RFR: 8300942: JDK-8299684 breaks x86 build

[Brian Burkhalter]

Fix the build on x86.

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Commit messages:
 - 8300942: JDK-8299684 breaks x86 build

Changes: https://git.openjdk.org/jdk/pull/12157/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12157&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300942
  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/12157.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12157/head:pull/12157

PR: https://git.openjdk.org/jdk/pull/12157