[lworld] Integrated: Merge jdk

[David Simms]

Merge tag 'jdk-16+7' into lworld_merge_jdk_16_7
Added tag jdk-16+7 for changeset c3a4a7ea7c30

# Conflicts:
#	src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp
#	src/hotspot/share/memory/universe.cpp
#	src/hotspot/share/memory/universe.hpp
#	src/hotspot/share/opto/macro.cpp
#	src/hotspot/share/opto/node.cpp
#	src/hotspot/share/prims/jni.cpp

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

Commit messages:
 - Merge tag 'jdk-16+7' into lworld_merge_jdk_16_7
 - 8249880: JVMCI calling register_nmethod without CodeCache lock
 - 8249884: Shenandoah: Call report_num_dead() from ShParallelWeakRootsCleaningTask destructor
 - 8249768: Move static oops and NullPointerException oops from Universe into OopStorage
 - 8222187: java.util.Base64.Decoder stream adds unexpected null bytes at the end
 - 8249877: Shenandoah: Report number of dead weak oops during STW weak roots
 - 8247743: Segmentation fault in debug builds due to stack overflow in find_recur with deep graphs
 - 8248467: C2: compiler/intrinsics/object/TestClone fails with -XX:+VerifyGraphEdges
 - 8249650: Optimize JNIHandle::make_local thread variable usage
 - 8246032: Implementation of JEP 347: Enable C++14 Language Features
 - ... and 66 more: https://git.openjdk.java.net/valhalla/compare/a8215ec3...686d3bc5

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.java.net/?repo=valhalla&pr=168&range=00.0
 - jdk: https://webrevs.openjdk.java.net/?repo=valhalla&pr=168&range=00.1

Changes: https://git.openjdk.java.net/valhalla/pull/168/files
  Stats: 8470 lines in 1321 files changed: 3670 ins; 2293 del; 2507 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/168.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/168/head:pull/168

PR: https://git.openjdk.java.net/valhalla/pull/168