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/servers/ser2net/default.nix

@@ -0,0 +1,39 @@
+{ autoreconfHook
+, fetchFromGitHub
+, gensio
+, lib
+, libyaml
+, nix-update-script
+, pkg-config
+, stdenv
+}:
+
+stdenv.mkDerivation rec {
+  pname = "ser2net";
+  version = "4.3.5";
+
+  src = fetchFromGitHub {
+    owner = "cminyard";
+    repo = pname;
+    rev = "v${version}";
+    hash = "sha256-B0O3Vcb+aM1qSQNrTFV9dY7j4CGOYFkGKfyMgt7PwIM=";
+  };
+
+  passthru = {
+    updateScript = nix-update-script {
+      attrPath = pname;
+    };
+  };
+
+  nativeBuildInputs = [ pkg-config autoreconfHook ];
+
+  buildInputs = [ gensio libyaml ];
+
+  meta = with lib; {
+    description = "Serial to network connection server";
+    homepage = "https://github.com/cminyard/ser2net";
+    license = licenses.gpl2Only;
+    maintainers = with maintainers; [ emantor ];
+    platforms = with platforms; linux;
+  };
+}