RFR: Merge jdk8u:master

[Andrew John Hughes]

Merge jdk8u342-b02

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Commit messages:
 - Merge jdk8u342-b02
 - 8221988: add possibility to build with Visual Studio 2019
 - 8170530: bash configure output contains a typo in a suggested library name
 - 8235211: serviceability/attach/RemovingUnixDomainSocketTest.java fails with AttachNotSupportedException: Unable to open socket file

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/shenandoah-jdk8u/pull/16/files
  Stats: 300 lines in 9 files changed: 260 ins; 2 del; 38 mod
  Patch: https://git.openjdk.org/shenandoah-jdk8u/pull/16.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk8u.git pull/16/head:pull/16

PR: https://git.openjdk.org/shenandoah-jdk8u/pull/16