bors 342db70ae4 Auto merge of #84200 - CDirkx:os, r=m-ou-se
Move all `sys::ext` modules to `os`

This PR moves all `sys::ext` modules to `os`, centralizing the location of all `os` code and simplifying the dependencies between `os` and `sys`.

Because this also removes all uses `cfg_if!` on publicly exported items, where after #81969 there were still a few left, this should properly work around https://github.com/rust-analyzer/rust-analyzer/issues/6038.

`@rustbot` label: +T-libs-impl
2021-05-05 14:15:19 +00:00
..