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/postfixadmin.nix

@@ -0,0 +1,31 @@
+import ./make-test-python.nix ({ pkgs, ...} : {
+  name = "postfixadmin";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ globin ];
+  };
+
+  nodes = {
+    postfixadmin = { config, pkgs, ... }: {
+      services.postfixadmin = {
+        enable = true;
+        hostName = "postfixadmin";
+        setupPasswordFile = pkgs.writeText "insecure-test-setup-pw-file" "$2y$10$r0p63YCjd9rb9nHrV9UtVuFgGTmPDLKu.0UIJoQTkWCZZze2iuB1m";
+      };
+      services.nginx.virtualHosts.postfixadmin = {
+        forceSSL = false;
+        enableACME = false;
+      };
+    };
+  };
+
+  testScript = ''
+    postfixadmin.start
+    postfixadmin.wait_for_unit("postgresql.service")
+    postfixadmin.wait_for_unit("phpfpm-postfixadmin.service")
+    postfixadmin.wait_for_unit("nginx.service")
+    postfixadmin.succeed(
+        "curl -sSfL http://postfixadmin/setup.php -X POST -F 'setup_password=not production'"
+    )
+    postfixadmin.succeed("curl -sSfL http://postfixadmin/ | grep 'Mail admins login here'")
+  '';
+})