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/pixiewps/default.nix

@@ -0,0 +1,26 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "pixiewps";
+  version = "1.2.2";
+  src = fetchFromGitHub {
+    owner = "wiire";
+    repo = "pixiewps";
+    rev = "v${version}";
+    sha256 = "09znnj7p8cks7zxzklkdm4zy2qnp92vhngm9r0zfgawnl2b4r2aw";
+  };
+
+  preBuild = ''
+    cd src
+    substituteInPlace Makefile --replace "\$(DESTDIR)/usr" "$out"
+    substituteInPlace Makefile --replace "/local" ""
+  '';
+
+  meta = {
+    description = "An offline WPS bruteforce utility";
+    homepage = "https://github.com/wiire/pixiewps";
+    license = lib.licenses.gpl3;
+    maintainers = [ lib.maintainers.nico202 ];
+    platforms = lib.platforms.all;
+  };
+}