[Issue 21974] ImportC: support __builtin_va_list, __builtin_va_start, __builtin_va_arg, __builtin_va_end

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21974

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #15 from Walter Bright <bugzilla at digitalmars.com> ---
Fixed by https://github.com/dlang/dmd/pull/13532

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