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/applications/graphics/ocrad/default.nix

@@ -0,0 +1,36 @@
+{ fetchurl, lib, stdenv, lzip, texinfo }:
+
+stdenv.mkDerivation rec {
+  pname = "ocrad";
+  version = "0.27";
+
+  src = fetchurl {
+    url = "mirror://gnu/ocrad/${pname}-${version}.tar.lz";
+    sha256 = "0divffvcaim89g4pvqs8kslbcxi475bcl3b4ynphf284k9zfdgx9";
+  };
+
+  nativeBuildInputs = [ lzip /* unpack */ ];
+  buildInputs = [ texinfo ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "Optical character recognition (OCR) program & library";
+    longDescription =
+      '' GNU Ocrad is an OCR (Optical Character Recognition) program based on
+         a feature extraction method.  It reads images in pbm (bitmap), pgm
+         (greyscale) or ppm (color) formats and produces text in byte (8-bit)
+         or UTF-8 formats.
+
+         Also includes a layout analyser able to separate the columns or
+         blocks of text normally found on printed pages.
+
+         Ocrad can be used as a stand-alone console application, or as a
+         backend to other programs.
+      '';
+
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ pSub ];
+    platforms = platforms.unix;
+  };
+}