mcfgthreads: 9570e5ca -> 10y2x3x6
mcfgthreads: 9570e5ca -> 10y2x3x6

The latest version non longer has `-Werror` (at our request; thanks!) so
we no longer need to patch it out.

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