RFR: 8242507: Add support for Visual Studio 2019

[Ambarish Rapte]

On Wed, 22 Apr 2020 18:46:29 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> This PR adds support for Microsoft Visual Studio 2019 (VS 2019), but does not change the default compiler, which
> remains at VS 2017 15.9.16. Changing the build compiler to VS 2019 will be proposed in a future PR using a new bug ID,
> and isn't planned until after the JDK updates their compiler.  In order to allow developer builds to use Microsoft
> Visual Studio 2019, we need the following changes at build time and runtime.
> At build time:
> 
> 1. Copy `vsruntime140_1.dll` (if present) to output `sdk/bin` dir
> 2. Don't copy the unused  `concrt140.dll` (it is not used in VS 2017 either)
> 
> At runtime:
> 
> 1. Load `vsruntime140_1.dll` if present
> 2. Don't load the unused `concrt140.dll`
> 
> Additionally, I removed two unused build variables, `ext.MSVCR` and `ext.MSVCP`, which would otherwise have needed to
> be updated.
> I have done a full build and test run using both VS 2017 (which is still the default), and VS 2019.

Looks good to me, verified the build locally.

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Marked as reviewed by arapte (Reviewer).

PR: https://git.openjdk.java.net/jfx/pull/195