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/rabbitmq.nix

@@ -0,0 +1,27 @@
+# This test runs rabbitmq and checks if rabbitmq is up and running.
+
+import ./make-test-python.nix ({ pkgs, ... }: {
+  name = "rabbitmq";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ eelco offline ];
+  };
+
+  nodes.machine = {
+    services.rabbitmq = {
+      enable = true;
+      managementPlugin.enable = true;
+    };
+    # Ensure there is sufficient extra disk space for rabbitmq to be happy
+    virtualisation.diskSize = 1024;
+  };
+
+  testScript = ''
+    machine.start()
+
+    machine.wait_for_unit("rabbitmq.service")
+    machine.wait_until_succeeds(
+        'su -s ${pkgs.runtimeShell} rabbitmq -c "rabbitmqctl status"'
+    )
+    machine.wait_for_open_port("15672")
+  '';
+})