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/magic/default.nix

@@ -0,0 +1,28 @@
+{ lib, stdenv
+, buildPythonPackage
+, pkgs
+}:
+
+buildPythonPackage {
+  name = pkgs.file.name;
+
+  src = pkgs.file.src;
+
+  patchPhase = ''
+    substituteInPlace python/magic.py --replace "find_library('magic')" "'${pkgs.file}/lib/libmagic${stdenv.hostPlatform.extensions.sharedLibrary}'"
+  '';
+
+  buildInputs = [ pkgs.file ];
+
+  preConfigure = "cd python";
+
+  # No test suite
+  doCheck = false;
+
+  meta = with lib; {
+    description = "A Python wrapper around libmagic";
+    homepage = "http://www.darwinsys.com/file/";
+    license = licenses.lgpl2;
+  };
+
+}