[vectorIntrinsics] RFR: Merge panama-vector:master

[Sandhya Viswanathan]

This pull request merges master changes into vectorIntrinsics.
Please review.

Best Regards,
Sandhya

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Commit messages:
 - Merge
 - 8259949: x86 32-bit build fails when -fcf-protection is passed in the compiler flags
 - 8259947: (fs) Optimize UnixPath.encode implementation
 - 8259843: initialize dli_fname array before calling dll_address_to_library_name
 - 8259786: initialize last parameter of getpwuid_r
 - 8257664: HTMLEditorKit: Wrong CSS relative font sizes
 - 8260005: Shenandoah: Remove unused AlwaysTrueClosure in ShenandoahConcurrentRootScanner::roots_do()
 - 8259867: Move encoding checks into ZipCoder
 - 8258383: vmTestbase/gc/g1/unloading/tests/unloading_compilation_level[1,2,3] time out without TieredCompilation
 - 8259983: do not use uninitialized expand_ms value in G1CollectedHeap::expand_heap_after_young_collection
 - ... and 672 more: https://git.openjdk.java.net/panama-vector/compare/2db19a41...e6c1778f

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - vectorIntrinsics: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=33&range=00.0
 - panama-vector:master: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=33&range=00.1

Changes: https://git.openjdk.java.net/panama-vector/pull/33/files
  Stats: 131967 lines in 3307 files changed: 71226 ins; 37684 del; 23057 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/33.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/33/head:pull/33

PR: https://git.openjdk.java.net/panama-vector/pull/33