[vectorIntrinsics] RFR: Merge panama-vector:master

[Eric Liu]

Resolve confilics in files:

        src/hotspot/cpu/aarch64/c2_MacroAssembler_aarch64.cpp
        src/hotspot/cpu/x86/matcher_x86.hpp
        src/hotspot/share/opto/loopTransform.cpp
        src/java.base/share/classes/jdk/internal/misc/X-ScopedMemoryAccess.java.template
        test/hotspot/gtest/aarch64/aarch64-asmtest.py
        test/hotspot/gtest/aarch64/asmtest.out.h

test/jdk/incubator/vector and test/hotspot/compiler/vectorapi passed on my SVE testing system.

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Commit messages:
 - Merge panama-vector:master into panama-vector:vectorInstrinsics
 - 8285696: AlgorithmConstraints:permits not throwing IllegalArgumentException when 'alg'  is null
 - 8285493: ECC calculation error
 - 8284910: Buffer clean in PasswordCallback
 - 8285683: Missing @ since 11 in java.security.spec.MGF1ParameterSpec fields
 - 8285756: clean up use of bad arguments for `@clean` in langtools tests
 - 8285032: vmTestbase/nsk/jdi/EventSet/suspendPolicy/suspendpolicy008/ fails with "eventSet.suspendPolicy() != policyExpected"
 - 8285658: Fix two typos in the spec of j.u.random.RandomGenerator
 - 8176501: Method Shape.getBounds2D() incorrectly includes Bezier control points in bounding box
 - 8280468: Crashes in getConfigColormap, getConfigVisualId, XVisualIDFromVisual on Linux
 - ... and 144 more: https://git.openjdk.java.net/panama-vector/compare/35d92ab6...5c144fad

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - vectorIntrinsics: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=199&range=00.0
 - panama-vector:master: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=199&range=00.1

Changes: https://git.openjdk.java.net/panama-vector/pull/199/files
  Stats: 25578 lines in 1188 files changed: 17133 ins; 3324 del; 5121 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/199.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/199/head:pull/199

PR: https://git.openjdk.java.net/panama-vector/pull/199