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/vlan/default.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation rec {
+  pname = "vlan";
+  version = "1.9";
+
+  src = fetchurl {
+    url = "mirror://gentoo/distfiles/vlan.${version}.tar.gz";
+    sha256 = "1jjc5f26hj7bk8nkjxsa8znfxcf8pgry2ipnwmj2fr6ky0dhm3rv";
+  };
+
+  hardeningDisable = [ "format" ];
+
+  preBuild =
+    ''
+      # Ouch, the tarball contains pre-compiled binaries.
+      make clean
+    '';
+
+  installPhase =
+    ''
+      mkdir -p $out/sbin
+      cp vconfig $out/sbin/
+
+      mkdir -p $out/share/man/man8
+      cp vconfig.8 $out/share/man/man8/
+    '';
+
+  meta = with lib; {
+    description = "User mode programs to enable VLANs on Ethernet devices";
+    platforms = platforms.linux;
+    license = licenses.gpl2Plus;
+  };
+}