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/monotonic/default.nix

@@ -0,0 +1,28 @@
+{ lib, stdenv
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "monotonic";
+  version = "1.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "3a55207bcfed53ddd5c5bae174524062935efed17792e9de2ad0205ce9ad63f7";
+  };
+
+  __propagatedImpureHostDeps = lib.optional stdenv.isDarwin "/usr/lib/libc.dylib";
+
+  patchPhase = lib.optionalString stdenv.isLinux ''
+    substituteInPlace monotonic.py --replace \
+      "ctypes.util.find_library('c')" "'${stdenv.cc.libc}/lib/libc.so'"
+  '';
+
+  meta = with lib; {
+    description = "An implementation of time.monotonic() for Python 2 & < 3.3";
+    homepage = "https://github.com/atdt/monotonic";
+    license = licenses.asl20;
+  };
+
+}