haskell.lib: make doDistribute respect badPlatforms
haskell.lib: make doDistribute respect badPlatforms

release-lib.nix's packagePlatforms will (understandably) take
hydraPlatforms at face value, so we need to make sure that we don't slip
anything actually unsupported in there.

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