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/pymavlink/default.nix

@@ -0,0 +1,28 @@
+{ lib, buildPythonPackage, fetchPypi, future, lxml }:
+
+buildPythonPackage rec {
+  pname = "pymavlink";
+  version = "2.4.29";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-0k6DKkb/Izk15JKrSOC0u5wL3vT4x2CelZt112vc/p0=";
+  };
+
+  propagatedBuildInputs = [ future lxml ];
+
+  # No tests included in PyPI tarball. We cannot use the GitHub tarball because
+  # we would like to use the same commit of the mavlink messages repo as
+  # included in the PyPI tarball, and there is no easy way to determine what
+  # commit is included.
+  doCheck = false;
+
+  pythonImportsCheck = [ "pymavlink" ];
+
+  meta = with lib; {
+    description = "Python MAVLink interface and utilities";
+    homepage = "https://github.com/ArduPilot/pymavlink";
+    license = with licenses; [ lgpl3Plus mit ];
+    maintainers = with maintainers; [ lopsided98 ];
+  };
+}