nix 0.30.1 expects SaFlags_t = c_ulong for target_os = "redox" (see nix-0.30.1/src/sys/signal.rs:430). Our relibc had c_int, causing type mismatch errors in uutils and any nix-dependent crate. Align with nix's expectation.
From release 0.1.0 pre-patched archive. This includes all Red Bear modifications previously maintained as patches in local/patches/relibc/.