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/python-modules/tesserocr/default.nix

@@ -0,0 +1,34 @@
+{
+  buildPythonPackage,
+  fetchPypi,
+  lib,
+  # build dependencies
+  cython,
+  leptonica,
+  pkg-config,
+  tesseract,
+  # extra python packages
+  pillow
+}:
+
+buildPythonPackage rec {
+  pname = "tesserocr";
+  version = "2.5.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1bmj76gi8401lcqdaaznfmz9yf11myy1bzivqwwq08z3dwzxswck";
+  };
+
+  nativeBuildInputs = [ cython pkg-config ];
+  buildInputs = [ leptonica tesseract ];
+  propagatedBuildInputs = [ pillow ];
+
+  meta = with lib; {
+    description = "A simple, Pillow-friendly, wrapper around the tesseract-ocr API for Optical Character Recognition (OCR)";
+    homepage = "https://github.com/sirfz/tesserocr";
+    license = licenses.mit;
+    maintainers = with maintainers; [ mtrsk ];
+    platforms = platforms.linux;
+  };
+}