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/libraries/farbfeld/default.nix

@@ -0,0 +1,29 @@
+{ lib, stdenv, fetchurl, makeWrapper, file, libpng, libjpeg }:
+
+stdenv.mkDerivation rec {
+  pname = "farbfeld";
+  version = "4";
+
+  src = fetchurl {
+    url = "https://dl.suckless.org/farbfeld/farbfeld-${version}.tar.gz";
+    sha256 = "0ap7rcngffhdd57jw9j22arzkbrhwh0zpxhwbdfwl8fixlhmkpy7";
+  };
+
+  buildInputs = [ libpng libjpeg ];
+  nativeBuildInputs = [ makeWrapper ];
+
+  makeFlags = [ "CC:=$(CC)" ];
+
+  installFlags = [ "PREFIX=$(out)" ];
+  postInstall = ''
+    wrapProgram "$out/bin/2ff" --prefix PATH : "${file}/bin"
+  '';
+
+  meta = with lib; {
+    description = "Suckless image format with conversion tools";
+    homepage = "https://tools.suckless.org/farbfeld/";
+    license = licenses.isc;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ pSub ];
+  };
+}