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/tools/security/fierce/default.nix

@@ -0,0 +1,40 @@
+{ lib
+, fetchFromGitHub
+, python3
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "fierce";
+  version = "1.5.0";
+  format = "setuptools";
+
+  src = fetchFromGitHub {
+    owner = "mschwager";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-9VTPD5i203BTl2nADjq131W9elgnaHNIWGIUuCiYlHg=";
+  };
+
+  propagatedBuildInputs = with python3.pkgs; [
+    dnspython
+  ];
+
+  postPatch = ''
+    substituteInPlace requirements.txt \
+      --replace 'dnspython==1.16.0' 'dnspython'
+  '';
+
+  # tests require network access
+  doCheck = false;
+
+  pythonImportsCheck = [
+    "fierce"
+  ];
+
+  meta = with lib; {
+    description = "DNS reconnaissance tool for locating non-contiguous IP space";
+    homepage = "https://github.com/mschwager/fierce";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ c0bw3b ];
+  };
+}