[vector-unstable] Integrated: Merge panama-vector:master

[Sandhya Viswanathan]

Merge panama-vector:master

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Commit messages:
 - Merge branch 'vector-unstable' into merge-vector-unstable-with-master
 - Merge
 - 8253274: The CycleDMImagetest brokes the system
 - 8253314: precompiled.hpp missing from vmIntrinsics.cpp
 - 8253028: SA core file tests still time out on OSX with "java.io.IOException: App waiting timeout"
 - 8253313: xmlstream.hpp missing from vmIntrinsics.cpp
 - 8253271: vm_version_x86.hpp should not include globals_extension.hpp
 - 8243066: Move VM_INTRINSICS_DO into its own vmIntrinsics.hpp file
 - 8253262: Allocate in DumpRegion is not thread safe
 - 8252041: G1: Fix incorrect uses of HeapRegionManager::max_length
 - ... and 118 more: https://git.openjdk.java.net/panama-vector/compare/58742cc5...179604b3

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - vector-unstable: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=6&range=00.0
 - panama-vector:master: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=6&range=00.1

Changes: https://git.openjdk.java.net/panama-vector/pull/6/files
  Stats: 21046 lines in 645 files changed: 10738 ins; 7499 del; 2809 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/6.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/6/head:pull/6

PR: https://git.openjdk.java.net/panama-vector/pull/6