Deal with gcc_s in extra-libraries for bits-extras
Deal with gcc_s in extra-libraries for bits-extras

Specific hack for NixOS/cabal2nix#71

jb55/cabal2nix,Fuuzetsu/cabal2nix,bennofs/cabal2nix,psibi/cabal2nix,dmalikov/cabal2nix,gridaphobe/cabal2nix,spencerjanssen/cabal2nix