[Issue 24509] importC cannot handle _stdcall Function Calling Convention with single heading underscore

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24509

--- Comment #1 from Ferhat Kurtulmuş <aferust at gmail.com> ---
Is it enough to create an alias for _stdcall token?

https://github.com/dlang/dmd/blob/9a86c4e06c5a22fb3be9f0daaec12b4120ef963f/compiler/src/dmd/tokens.d#L585
https://github.com/dlang/dmd/blob/9a86c4e06c5a22fb3be9f0daaec12b4120ef963f/compiler/src/dmd/cparse.d#L2404

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