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/development/libraries/libsearpc/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, autoreconfHook
+, pkg-config
+, python3
+, glib
+, jansson
+}:
+
+stdenv.mkDerivation rec {
+  version = "3.2.0";
+  pname = "libsearpc";
+
+  src = fetchFromGitHub {
+    owner = "haiwen";
+    repo = "libsearpc";
+    rev = "v${version}";
+    sha256 = "18i5zvrp6dv6vygxx5nc93mai2p2x786n5lnf5avrin6xiz2j6hd";
+  };
+
+  nativeBuildInputs = [
+    autoreconfHook
+    pkg-config
+  ];
+
+  buildInputs = [
+    python3
+  ];
+
+  propagatedBuildInputs = [
+    glib
+    jansson
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/haiwen/libsearpc";
+    description = "A simple and easy-to-use C language RPC framework based on GObject System";
+    license = licenses.lgpl3;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ greizgh ];
+  };
+}