Add {pkgsMusl,pkgsStatic}.stdenv to build on hydra (#89425)
Add {pkgsMusl,pkgsStatic}.stdenv to build on hydra (#89425)

* Add pkgsMusl.stdenv to block nixpkgs channel

* Don’t include i686-linux for pkgs{Musl,Static}

musl bootstrapping is unavailable for i686-linux right now. so we can
just exclude it from hydra.

Co-authored-by: Matthew Bauer <36b958e71a3497df54c138eca2250535100c5292@gmail.com>
NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs