Fix wrong clang used on Windows

[Fernthedev]

In relation to the issue I created here #156, I started looking deeper into Rust Bindgen issues and found some things that indicated bindgen was using the wrong clang with clang-sys. The environment provided allows clang-sys to use Android NDK clang and setup properly. The extension is required on Windows.

It seems to be working properly, at least finding the headers.

Relation:
rust-lang/rust-bindgen#2962
https://github.com/KyleMayes/clang-sys?tab=readme-ov-file#environment-variables

Fixing this resolves #156 in my use case at least.

[bbqsrc]

If you only have the CLANG_PATH variable change, does that solve the problem? Adding explicit .exe handling doesn’t strike me as something that will have any effect due to how windows resolves executables, and the space after the -I will probably cause some surprising nightmares down the line.

[Fernthedev]

Well surprisingly, yes it does! I get a warning that the path is invalid without the extension, as it seems to assume it's a directory.

As for the space, that was an accident leftover from by debugging. I'll go resolve that now, sorry!

[Fernthedev]

For further context, only the CLANG_PATH environment variable cares about the extension path. The rest of the changes were just for consistency, but I can revert those changes and only give the extension to the CLANG_PATH variable.

[bbqsrc]

That would be much preferable. 😊

[Fernthedev]

Done, and I verified it still works. Thanks