[lworld+fp16] RFR: Merge lworld

[Jatin Bhateja]

Merge latest changes from lworld.

FP16 specific tests and tier1 regressions are clean.

Best Regards,
Jatin

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Commit messages:
 - Merge branch 'lworld' of http://github.com/openjdk/valhalla into merge_lworld_to_fp16
 - 8323781: [lworld] Synchronization on inline type does not throw IllegalMonitorStateException with lightweight locking
 - Merge jdk
 - 8318363: Foreign benchmarks fail to build on some platforms
 - 8318183: C2: VM may crash after hitting node limit
 - 8315974: Make fields final in 'com.sun.crypto.provider' package
 - 8317886: Add @sealedGraph to ByteBuffer
 - 8318365: Test runtime/cds/appcds/sharedStrings/InternSharedString.java fails after JDK-8311538
 - 8309966: Enhanced TLS connections
 - 8286503: Enhance security classes
 - ... and 1220 more: https://git.openjdk.org/valhalla/compare/6f1ecb88...a39c9036

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld+fp16: https://webrevs.openjdk.org/?repo=valhalla&pr=974&range=00.0
 - lworld: https://webrevs.openjdk.org/?repo=valhalla&pr=974&range=00.1

Changes: https://git.openjdk.org/valhalla/pull/974/files
  Stats: 166439 lines in 4539 files changed: 81714 ins; 35523 del; 49202 mod
  Patch: https://git.openjdk.org/valhalla/pull/974.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/974/head:pull/974

PR: https://git.openjdk.org/valhalla/pull/974