[lworld] RFR: 8270527: [lworld] markWord::print_on() needs to reflect the additional Valhalla mark word bits

[Paul Hübner]

Hi all,

This adds debug information to the `markWord::print_on` method for the Valhalla bits. The existing unit tests have been augmented.

Testing: tier 1.

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Commit messages:
 - Pretty print Valhalla mark word bits.

Changes: https://git.openjdk.org/valhalla/pull/1588/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1588&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8270527
  Stats: 33 lines in 2 files changed: 31 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/valhalla/pull/1588.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1588/head:pull/1588

PR: https://git.openjdk.org/valhalla/pull/1588