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/sx-go/default.nix

@@ -0,0 +1,37 @@
+{ stdenv
+, lib
+, buildGoModule
+, fetchFromGitHub
+, libpcap
+}:
+
+buildGoModule rec {
+  pname = "sx-go";
+  version = "0.4.0";
+
+  src = fetchFromGitHub {
+    owner = "v-byte-cpu";
+    repo = "sx";
+    rev = "v${version}";
+    sha256 = "0djpwy40wj5asky8a16i7a117816p8g94p5y0wkl74jp07cybmrl";
+  };
+
+  vendorSha256 = "0n1h9jch0zfafli8djjr6wkgfxxpnh4q873d5mr1xg8a25qhlifr";
+
+  buildInputs = [
+    libpcap
+  ];
+
+  postFixup = ''
+    # Rename binary to avoid conflict with sx
+    mv $out/bin/sx $out/bin/${pname}
+  '';
+
+  meta = with lib; {
+    broken = stdenv.isDarwin;
+    description = "Command-line network scanner";
+    homepage = "https://github.com/v-byte-cpu/sx";
+    license = licenses.mit;
+    maintainers = with maintainers; [ fab ];
+  };
+}