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/networking/simpleproxy/default.nix

@@ -0,0 +1,21 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "simpleproxy";
+  version = "3.5";
+  rev = "v.${version}";
+
+  src = fetchFromGitHub {
+    inherit rev;
+    owner = "vzaliva";
+    repo = "simpleproxy";
+    sha256 = "1my9g4vp19dikx3fsbii4ichid1bs9b9in46bkg05gbljhj340f6";
+  };
+
+  meta = with lib; {
+    homepage = "https://github.com/vzaliva/simpleproxy";
+    description = "A simple TCP proxy";
+    license = licenses.gpl2;
+    maintainers = [ maintainers.montag451 ];
+  };
+}