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/cowpatty/default.nix

@@ -0,0 +1,48 @@
+{ lib
+, stdenv
+, clang
+, fetchFromGitHub
+, installShellFiles
+, openssl
+, libpcap
+}:
+
+stdenv.mkDerivation rec {
+  pname = "cowpatty";
+  version = "4.8";
+
+  src = fetchFromGitHub {
+    owner = "joswr1ght";
+    repo = pname;
+    rev = version;
+    sha256 = "0fvwwghhd7wsx0lw2dj9rdsjnirawnq3c6silzvhi0yfnzn5fs0s";
+  };
+
+  nativeBuildInputs = [
+    clang
+    installShellFiles
+  ];
+
+  buildInputs = [
+    openssl
+    libpcap
+  ];
+
+  makeFlags = [
+    "DESTDIR=$(out)"
+    "BINDIR=/bin"
+  ];
+
+  postInstall = ''
+    installManPage cowpatty.1
+    installManPage genpmk.1
+  '';
+
+  meta = with lib; {
+    description = "Offline dictionary attack against WPA/WPA2 networks";
+    homepage = "https://github.com/joswr1ght/cowpatty";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ nico202 fab ];
+    platforms = platforms.linux;
+  };
+}