RFR: Merge lworld

[David Simms]

Merge jdk-16+20

Adjust to vmSymbols changes

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Commit messages:
 - Adjust to vmSymbols changes
 - Merge branch 'lworld' into type_restrictions_merge_lworld_jdk_16_20
 - Merge jdk
 - 8254125: Assertion in cppVtables.cpp during builds on 32bit Windows
 - 8254369: Node::disconnect_inputs may skip precedences
 - 8251325: Miss 'L' for long value in if statement
 - 8254192: ExtraSharedClassListFile contains extra white space at end of line
 - 8254799: runtime/ErrorHandling/TestHeapDumpOnOutOfMemoryError.java fails with release VMs
 - 8254811: JDK-8254158 broke ppc64, s390 builds
 - 8249878: jfr_emergency_dump has secondary crashes
 - ... and 136 more: https://git.openjdk.java.net/valhalla/compare/0fb77efa...e623b9fe

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - type-restrictions: https://webrevs.openjdk.java.net/?repo=valhalla&pr=228&range=00.0
 - lworld: https://webrevs.openjdk.java.net/?repo=valhalla&pr=228&range=00.1

Changes: https://git.openjdk.java.net/valhalla/pull/228/files
  Stats: 321759 lines in 989 files changed: 308844 ins; 7226 del; 5689 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/228.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/228/head:pull/228

PR: https://git.openjdk.java.net/valhalla/pull/228