[lworld+fp16] Integrated: Merge lworld

[Jatin Bhateja]

Merge latest lworld into lworld+fp16.

- Removed duplicate occurrences of libLinkerInvokerUnnamed.cpp, artifact of last merge.
- All Float16 specific vectorization tests are passing with this merge.

Best Regards,
Jatin

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

Commit messages:
 - Regressions fixes
 - Merge branch 'lworld' of http://github.com/openjdk/valhalla into merge_lworld_into_lworldfp16
 - 8339076: Float16.valueOf(long) incorrectly returns infinities in some cases
 - Merge lworld
 - 8334432: Refine Float16.fma
 - 8337605: Update description of constants in Float16
 - 8338102: x86 backend support for newly added Float16 intrinsics.
 - 8336406: Add support for FP16 binary operations
 - 8330021: AArch64: Add backend support for FP16 add operation
 - 8333852: Allow flat array layout for value based classes.
 - ... and 6 more: https://git.openjdk.org/valhalla/compare/e9ce5a94...407b1608

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/valhalla/pull/1235/files
  Stats: 5468 lines in 73 files changed: 4665 ins; 4 del; 799 mod
  Patch: https://git.openjdk.org/valhalla/pull/1235.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1235/head:pull/1235

PR: https://git.openjdk.org/valhalla/pull/1235