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>

nixos/tests/plikd.nix

@@ -0,0 +1,27 @@
+import ./make-test-python.nix ({ lib, ... }: {
+  name = "plikd";
+  meta = with lib.maintainers; {
+    maintainers = [ freezeboy ];
+  };
+
+  nodes.machine = { pkgs, ... }: let
+  in {
+    services.plikd.enable = true;
+    environment.systemPackages = [ pkgs.plik ];
+  };
+
+  testScript = ''
+    # Service basic test
+    machine.wait_for_unit("plikd")
+
+    # Network test
+    machine.wait_for_open_port("8080")
+    machine.succeed("curl --fail -v http://localhost:8080")
+
+    # Application test
+    machine.execute("echo test > /tmp/data.txt")
+    machine.succeed("plik --server http://localhost:8080 /tmp/data.txt | grep curl")
+
+    machine.succeed("diff data.txt /tmp/data.txt")
+  '';
+})