copper: 4.4 -> 4.6

pkgs/development/compilers/copper/default.nix

···
 }:
 stdenv.mkDerivation rec {
   pname = "copper";
-  version = "4.4";
+  version = "4.6";
   src = fetchurl {
     url = "https://tibleiz.net/download/copper-${version}-src.tar.gz";
-    sha256 = "1nf0bw143rjhd019yms3k6k531rahl8anidwh6bif0gm7cngfwfw";
+    sha256 = "sha256-tyxAMJp4H50eBz8gjt2O3zj5fq6nOIXKX47wql8aUUg=";
   };
   buildInputs = [
     libffi
   ];
   postPatch = ''
-    substituteInPlace Makefile --replace "-s scripts/" "scripts/"
     patchShebangs .
   '';
   buildPhase = ''