RFR: 8257233: Windows x86 build is broken by JDK-8252684

[David Holmes]

Moved the ifdef after the include of precompiled.hpp.

Awaiting GHA results.

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Commit messages:
 - 8257233: Windows x86 build is broken by JDK-8252684

Changes: https://git.openjdk.java.net/jdk/pull/1500/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1500&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257233
  Stats: 3 lines in 1 file changed: 2 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1500.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1500/head:pull/1500

PR: https://git.openjdk.java.net/jdk/pull/1500