[lworld] Integrated: Missing include

[David Simms]

Post merge won't compile without precompiled headers

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Commit messages:
 - Missing include

Changes: https://git.openjdk.org/valhalla/pull/1607/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1607&range=00
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/1607.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1607/head:pull/1607

PR: https://git.openjdk.org/valhalla/pull/1607