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/cd-dvd/cdi2iso/default.nix

@@ -0,0 +1,28 @@
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation rec {
+  pname = "cdi2iso";
+  version = "0.1";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/cdi2iso.berlios/${pname}-${version}-src.tar.gz";
+    sha256 = "0fj2fxhpr26z649m0ph71378c41ljflpyk89g87x8r1mc4rbq3kh";
+  };
+
+  postPatch = ''
+    substituteInPlace Makefile --replace "gcc" "${stdenv.cc.targetPrefix}cc"
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp cdi2iso $out/bin
+  '';
+
+  meta = with lib; {
+    description = "A very simple utility for converting DiscJuggler images to the standard ISO-9660 format";
+    homepage = "https://sourceforge.net/projects/cdi2iso.berlios";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ hrdinka ];
+    platforms = platforms.all;
+  };
+}