fix: Bring back redox compilation

Cargo.lock

Cargo.lock.orig

Cargo.toml

Cargo_BACKUP_27027.lock

Cargo_BASE_27027.lock

Cargo_LOCAL_27027.lock

Cargo_REMOTE_27027.lock

examples/window.rs

sh-interrupt/testshell

src/binary/completer.rs

src/lib/builtins/mod.rs

src/lib/builtins/test.rs

src/lib/shell/directory_stack.rs

src/lib/shell/shell_expand.rs

src/lib/shell/shell_expand.rs.orig

src/lib/shell/signals.rs

src/lib/shell/sys/mod.rs

src/lib/shell/sys/signals.rs