Use cfg_if to branch code in WaitStatus decode
Use cfg_if to branch code in WaitStatus decode

kamalmarhubi/nix-rust,xd009642/nix,xd009642/nix,nix-rust/nix,kamalmarhubi/nix-rust,xd009642/nix,nix-rust/nix,Susurrus/nix,carllerche/nix-rust,berkowski/nix,kamalmarhubi/nix-rust,carllerche/nix-rust,berkowski/nix,geofft/nix-rust,geofft/nix-rust,MarkusJais/nix-rust,asomers/nix,carllerche/nix-rust,MarkusJais/nix-rust,posborne/rust-nix,posborne/rust-nix,Susurrus/nix,berkowski/nix,MarkusJais/nix-rust,asomers/nix,Susurrus/nix,posborne/rust-nix,geofft/nix-rust