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/testing-common-database/default.nix

@@ -0,0 +1,26 @@
+{ lib, buildPythonPackage, fetchPypi  }:
+
+buildPythonPackage rec {
+  pname = "testing.common.database";
+  version = "2.0.3";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0wvdv0frl7xib05sixjv9m6jywaa2wdhdhsqqdfk45akk2r80pcn";
+  };
+
+  postPatch =  ''
+    substituteInPlace src/testing/common/database.py \
+      --replace "collections.Callable" "collections.abc.Callable"
+  '';
+
+  # There are no unit tests
+  doCheck = false;
+
+  meta = with lib; {
+    description = "utilities for testing.* packages";
+    homepage = "https://github.com/tk0miya/testing.common.database";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ jluttine ];
+  };
+}