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/power/default.nix

@@ -0,0 +1,26 @@
+{ stdenv
+, lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "power";
+  version = "1.4";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "7d7d60ec332acbe3a7d00379b45e39abf650bf7ee311d61da5ab921f52f060f0";
+  };
+
+  # Tests can't work because there is no power information available.
+  doCheck = false;
+
+  meta = with lib; {
+    broken = stdenv.isDarwin;
+    description = "Cross-platform system power status information";
+    homepage = "https://github.com/Kentzo/Power";
+    license = licenses.mit;
+  };
+
+}