[lworld] RFR: LW3 version string

[David Simms]

Changed the version-pre option to lworld3ea

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Commit messages:
 - LW3 version string

Changes: https://git.openjdk.java.net/valhalla/pull/92/files
 Webrev: https://webrevs.openjdk.java.net/valhalla/92/webrev.00
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/92.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/92/head:pull/92

PR: https://git.openjdk.java.net/valhalla/pull/92