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/sympa.nix

@@ -0,0 +1,35 @@
+import ./make-test-python.nix ({ pkgs, lib, ... }: {
+  name = "sympa";
+  meta.maintainers = with lib.maintainers; [ mmilata ];
+
+  nodes.machine =
+    { ... }:
+    {
+
+      services.sympa = {
+        enable = true;
+        domains = {
+          "lists.example.org" = {
+            webHost = "localhost";
+          };
+        };
+        listMasters = [ "joe@example.org" ];
+        web.enable = true;
+        web.https = false;
+        database = {
+          type = "PostgreSQL";
+          createLocally = true;
+        };
+      };
+    };
+
+  testScript = ''
+    start_all()
+
+    machine.wait_for_unit("sympa.service")
+    machine.wait_for_unit("wwsympa.service")
+    assert "Mailing lists service" in machine.succeed(
+        "curl --fail --insecure -L http://localhost/"
+    )
+  '';
+})