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/pypeg2/default.nix

@@ -0,0 +1,30 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy3k
+}:
+
+buildPythonPackage rec {
+  version = "2.15.2";
+  pname = "pypeg2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0v8ziaam2r637v94ra4dbjw6jzxz99gs5x4i585kgag1v204yb9b";
+  };
+
+  checkPhase = ''
+    # The tests assume that test_xmlast does not run before test_pyPEG2.
+    python -m unittest pypeg2.test.test_pyPEG2 pypeg2.test.test_xmlast
+  '';
+
+  #https://bitbucket.org/fdik/pypeg/issues/36/test-failures-on-py35
+  doCheck = !isPy3k;
+
+  meta = with lib; {
+    description = "PEG parser interpreter in Python";
+    homepage = "http://fdik.org/pyPEG";
+    license = licenses.gpl2;
+  };
+
+}