[foreign-jextract] RFR: 8252931: Extend multiple constant classes support to ClassConstantHelper [v2]

[Jorn Vernee]

> Hi,
> 
> This PR extracts the multiple source file functionality from SourceConstantHelper into a decorator class, and then uses
> it for ClassConstantHelper as well.
> (I've also done a minor cleanup where I simplified the way booleans are turned into constants, since we can now just
> call describeConstable() on a Boolean)
> Thanks,
> Jorn

Jorn Vernee has updated the pull request incrementally with one additional commit since the last revision:

  Have a separate constants per class limit for binary generation

-------------

Changes:
  - all: https://git.openjdk.java.net/panama-foreign/pull/314/files
  - new: https://git.openjdk.java.net/panama-foreign/pull/314/files/329429d6..c39916a6

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=314&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=314&range=00-01

  Stats: 11 lines in 2 files changed: 6 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/314.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/314/head:pull/314

PR: https://git.openjdk.java.net/panama-foreign/pull/314