RFR: 8256686: GitHub actions: build fails due to upgraded MSVC compiler

[Ambarish Rapte]

On Thu, 19 Nov 2020 17:47:28 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> Simple fix to get GitHub actions working again on Windows. In parallel I will bump the priority of [JDK-8255713](https://bugs.openjdk.java.net/browse/JDK-8255713) so we will detect the version of the compiler and not be sensitive to changes like this on the target machine.

The Windows test passes on this PR, and it is the the fix we need.

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Marked as reviewed by arapte (Reviewer).

PR: https://git.openjdk.java.net/jfx/pull/357