[lworld] RFR: [lworld] Invoking a reflection-generated constructor for primitive class gives InstantiationError

[Jesper Steen Møller]

Update constructor accessor code generation to invoke static factory method.

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Commit messages:
 - [lworld] Invoking a reflection-generated constructor for primitive class gives InstantiationError

Changes: https://git.openjdk.java.net/valhalla/pull/546/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=546&range=00
  Stats: 13 lines in 3 files changed: 8 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/546.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/546/head:pull/546

PR: https://git.openjdk.java.net/valhalla/pull/546