uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/os-specific/linux/selinux-python/default.nix

@@ -0,0 +1,51 @@
+{ lib, stdenv, fetchurl, python3
+, libselinux, libsemanage, libsepol, setools }:
+
+# this is python3 only because setools only supports python3
+
+with lib;
+
+stdenv.mkDerivation rec {
+  pname = "selinux-python";
+  version = "3.3";
+
+  inherit (libsepol) se_url;
+
+  src = fetchurl {
+    url = "${se_url}/${version}/selinux-python-${version}.tar.gz";
+    sha256 = "1v244hpb45my303793xa4kcn7qnxjgxn4ja7rdn9k1q361hi1nca";
+  };
+
+  strictDeps = true;
+
+  nativeBuildInputs = [ python3 python3.pkgs.wrapPython ];
+  buildInputs = [ libsepol ];
+  propagatedBuildInputs = [ libselinux libsemanage setools python3.pkgs.ipy ];
+
+  postPatch = ''
+    substituteInPlace sepolicy/Makefile --replace "echo --root" "echo --prefix"
+    substituteInPlace sepolgen/src/share/Makefile --replace "/var/lib/sepolgen" \
+                                                            "\$PREFIX/var/lib/sepolgen"
+  '';
+
+  makeFlags = [
+    "PREFIX=$(out)"
+    "LOCALEDIR=$(out)/share/locale"
+    "BASHCOMPLETIONDIR=$(out)/share/bash-completion/completions"
+    "PYTHON=python"
+    "PYTHONLIBDIR=$(out)/${python3.sitePackages}"
+    "LIBSEPOLA=${lib.getLib libsepol}/lib/libsepol.a"
+  ];
+
+
+  postFixup = ''
+    wrapPythonPrograms
+  '';
+
+  meta = {
+    description = "SELinux policy core utilities written in Python";
+    license = licenses.gpl2;
+    homepage = "https://selinuxproject.org";
+    platforms = platforms.linux;
+  };
+}