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/pycrypto/default.nix

@@ -0,0 +1,28 @@
+{ buildPythonPackage, pycryptodome }:
+
+# This is a dummy package providing the drop-in replacement pycryptodome.
+# https://github.com/NixOS/nixpkgs/issues/21671
+
+buildPythonPackage rec {
+  pname = "pycrypto";
+  version = pycryptodome.version;
+
+  # Cannot build wheel otherwise (zip 1980 issue)
+  SOURCE_DATE_EPOCH=315532800;
+
+  # We need to have a dist-info folder, so let's create one with setuptools
+  unpackPhase = ''
+    echo "from setuptools import setup; setup(name='${pname}', version='${version}', install_requires=['pycryptodome'])" > setup.py
+  '';
+
+  propagatedBuildInputs = [ pycryptodome ];
+
+  # Our dummy has no tests
+  doCheck = false;
+
+  meta = {
+    homepage = "https://www.pycrypto.org/";
+    description = "Drop-in replacement for pycrypto using pycryptodome";
+    platforms = pycryptodome.meta.platforms;
+  };
+}