Merge pull request RustPython#4868 from coolreader18/upd-errno

Update errno crate to 0.3.1 for redox

Author: youknowone

Cargo.lock

@@ -129,5 +129,4 @@ lto = "thin"
 [patch.crates-io]
 # REDOX START, Uncomment when you want to compile/check with redoxer
 # nix = { git = "https://github.com/coolreader18/nix", branch = "0.26.2-redox" }
-# errno = { git = "https://github.com/coolreader18/rust-errno", branch = "0.2.8-redox" }
 # REDOX END