RFR: 8371967: Add Visual Studio 2026 to build toolchain for Windows

[Yasumasa Suenaga]

On Mon, 17 Nov 2025 20:40:10 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

>> Microsoft has been published Visual Studio 2026, and it can build OpenJDK for Windows without any code changes if we add it to build toolchain.
>> 
>> Now we should support new Visual Studio for maintainability.
>
> Looks good to me, as long as it works. I don't have the ability to verify myself so will have to take your word for it.

Thanks @erikj79 for your review!
I tested this change with VS 2026 Community Edition on WSL1 (Fedora 42) on Windows 11 25H2.

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PR Comment: https://git.openjdk.org/jdk/pull/28342#issuecomment-3544355349