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/tools/graphics/cfdg/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, fetchFromGitHub, libpng, bison, flex, ffmpeg, icu }:
+
+stdenv.mkDerivation rec {
+  pname = "cfdg";
+  version = "3.3";
+  src = fetchFromGitHub {
+    owner = "MtnViewJohn";
+    repo = "context-free";
+    rev = "Version${version}";
+    sha256 = "13m8npccacmgxbs4il45zw53dskjh53ngv2nxahwqw8shjrws4mh";
+  };
+
+  buildInputs = [ libpng bison flex ffmpeg icu ];
+
+  postPatch = ''
+    sed -e "/YY_NO_UNISTD/a#include <stdio.h>" -i src-common/cfdg.l
+    sed -e '1i#include <algorithm>' -i src-common/{cfdg,builder,ast}.cpp
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp cfdg $out/bin/
+
+    mkdir -p $out/share/doc/${pname}-${version}
+    cp *.txt $out/share/doc/${pname}-${version}
+  '';
+
+  meta = with lib; {
+    description = "Context-free design grammar - a tool for graphics generation";
+    maintainers = with maintainers; [ raskin ];
+    platforms = platforms.linux;
+    homepage = "https://contextfreeart.org/";
+    license = licenses.gpl2;
+  };
+}