[lworld] Integrated: 8244513: [lworld] Typing of conditional expressions involving values.

[Srikanth Adayapalam]

For now, make typing of conditionals mimic the rules for primitives and boxing.

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Commit messages:
 - 8244513: [lworld] Typing of conditional expressions involving values.
 - 8244513: [lworld] Typing of conditional expressions involving values.

Changes: https://git.openjdk.java.net/valhalla/pull/147/files
 Webrev: https://webrevs.openjdk.java.net/valhalla/147/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8244513
  Stats: 127 lines in 5 files changed: 106 ins; 17 del; 4 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/147.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/147/head:pull/147

PR: https://git.openjdk.java.net/valhalla/pull/147