[lworld] RFR: 8277057: [lworld] array code needs some name cleanup

[Frederic Parain]

Please review this changeset which renames some flags and methods to align them with the current semantics and behavior. Clearer names would help introducing nullable inline types later.

Thank you,

Fred

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Commit messages:
 - Renaming of flags and methods

Changes: https://git.openjdk.java.net/valhalla/pull/582/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=582&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277057
  Stats: 75 lines in 24 files changed: 0 ins; 0 del; 75 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/582.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/582/head:pull/582

PR: https://git.openjdk.java.net/valhalla/pull/582