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/python-gnupg/default.nix

@@ -0,0 +1,28 @@
+{ lib, buildPythonPackage, fetchPypi, gnupg }:
+
+buildPythonPackage rec {
+  pname   = "python-gnupg";
+  version = "0.4.8";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "b64de1ae5cedf872b437201a566fa2c62ce0c95ea2e30177eb53aee1258507d7";
+  };
+
+  # Let's make the library default to our gpg binary
+  patchPhase = ''
+    substituteInPlace gnupg.py \
+    --replace "gpgbinary='gpg'" "gpgbinary='${gnupg}/bin/gpg'"
+    substituteInPlace test_gnupg.py \
+    --replace "gpgbinary=GPGBINARY" "gpgbinary='${gnupg}/bin/gpg'" \
+    --replace "test_search_keys" "disabled__test_search_keys"
+  '';
+
+  meta = with lib; {
+    description = "A wrapper for the Gnu Privacy Guard";
+    homepage    = "https://pypi.python.org/pypi/python-gnupg";
+    license     = licenses.bsd3;
+    maintainers = with maintainers; [ copumpkin ];
+    platforms   = platforms.unix;
+  };
+}