swift

c75781ae - [Threading] Use `tss_dtor_t` and not just `void(*)(void *)`.

[Threading] Use `tss_dtor_t` and not just `void(*)(void *)`. Although the C11 spec says `tss_dtor_t` is `void(*)(void *)`, there may be modifiers on the former typedef, so we should use it instead of directly writing the type. rdar://144220714