[lworld] RFR: 8280381: [lworld] VM should accept static factory methods in value class files.

[Frederic Parain]

Please review this patch that enables loading of value classes.
Support for value classes is minimal, but this is the first step to implement them.
The patch also includes some renaming to align Hotspot code with the JVMS draft.

Tested with Mach5, tiers 1-3 (so it builds on all platforms)

Thank you,

Fred

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Commit messages:
 - Allow value classes to be loaded by the VM

Changes: https://git.openjdk.java.net/valhalla/pull/609/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=609&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8280381
  Stats: 110 lines in 42 files changed: 9 ins; 0 del; 101 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/609.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/609/head:pull/609

PR: https://git.openjdk.java.net/valhalla/pull/609