[master] RFR: 8319185: [Lilliput] Enable and fix vectorization tests

[Roman Kennke]

This re-instates #125 after it has been lost with the Great Reset. It's a clean cherry-pick of that other commit.

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Commit messages:
 - 8319185: [Lilliput] Enable and fix vectorization tests

Changes: https://git.openjdk.org/lilliput/pull/152/files
  Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=152&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319185
  Stats: 18 lines in 4 files changed: 9 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/lilliput/pull/152.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/152/head:pull/152

PR: https://git.openjdk.org/lilliput/pull/152