[jdk11u-dev] RFR: 8221988: add possibility to build with Visual Studio 2019

Tue Aug 3 05:30:24 UTC 2021

This is another backport that is needed for GitHub Actions. The Runners will use a VS 2019 installation as base and use VS2017 as a minor version that is installed into the VS 2019 installation.
Patch applies cleanly after JDK-8220445 backport, except for copyright in toolchain_windows.m4.

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Depends on: https://git.openjdk.java.net/jdk11u-dev/pull/180

Commit messages:
 - 8221988: add possibility to build with Visual Studio 2019

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/181/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=181&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8221988
  Stats: 229 lines in 4 files changed: 223 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/181.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/181/head:pull/181

PR: https://git.openjdk.java.net/jdk11u-dev/pull/181