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/trufflehog/default.nix

@@ -0,0 +1,38 @@
+{ lib, python3Packages }:
+
+let
+  truffleHogRegexes = python3Packages.buildPythonPackage rec {
+    pname = "truffleHogRegexes";
+    version = "0.0.7";
+    src = python3Packages.fetchPypi {
+      inherit pname version;
+      sha256 = "b81dfc60c86c1e353f436a0e201fd88edb72d5a574615a7858485c59edf32405";
+    };
+  };
+in
+  python3Packages.buildPythonApplication rec {
+    pname = "truffleHog";
+    version = "2.2.1";
+
+    src = python3Packages.fetchPypi {
+      inherit pname version;
+      sha256 = "sha256-fw0JyM2iqQrkL4FAXllEozJdkKWELS3eAURx5NZcceQ=";
+    };
+
+    # Relax overly restricted version constraint
+    postPatch = ''
+      substituteInPlace setup.py --replace "GitPython ==" "GitPython >= "
+    '';
+
+    propagatedBuildInputs = [ python3Packages.GitPython truffleHogRegexes ];
+
+    # Test cases run git clone and require network access
+    doCheck = false;
+
+    meta = {
+      homepage = "https://github.com/dxa4481/truffleHog";
+      description = "Searches through git repositories for high entropy strings and secrets, digging deep into commit history";
+      license = with lib.licenses; [ gpl2 ];
+      maintainers = with lib.maintainers; [ bhipple ];
+    };
+  }