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/development/tools/misc/doclifter/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, fetchurl, python3, makeWrapper, libxml2 }:
+
+stdenv.mkDerivation rec {
+  pname = "doclifter";
+  version = "2.20";
+  src = fetchurl {
+    url = "http://www.catb.org/~esr/${pname}/${pname}-${version}.tar.gz";
+    sha256 = "sha256-BEuMbICJ8TD3+VjUr8rmhss7XlPNjxSy1P0SkmKLPsc=";
+  };
+  buildInputs = [ python3 ];
+  nativeBuildInputs = [ python3 makeWrapper ];
+
+  strictDeps = true;
+
+  makeFlags = [ "PREFIX=$(out)" ];
+
+  preInstall = ''
+    mkdir -p $out/bin
+    mkdir -p $out/share/man/man1
+    substituteInPlace manlifter \
+      --replace '/usr/bin/env python2' '/usr/bin/env python3'
+    2to3 -w manlifter
+    cp manlifter $out/bin
+    wrapProgram "$out/bin/manlifter" \
+        --prefix PATH : "${libxml2}/bin:$out/bin"
+    cp manlifter.1 $out/share/man/man1
+  '';
+
+  meta = {
+    description = "Lift documents in nroff markups to XML-DocBook";
+    homepage = "http://www.catb.org/esr/doclifter";
+    license = "BSD";
+    platforms = lib.platforms.unix;
+  };
+}