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/gocd-agent.nix

@@ -0,0 +1,48 @@
+# verifies:
+#   1. GoCD agent starts
+#   2. GoCD agent responds
+#   3. GoCD agent is available on GoCD server using GoCD API
+#     3.1. https://api.go.cd/current/#get-all-agents
+
+let
+  serverUrl = "localhost:8153/go/api/agents";
+  header = "Accept: application/vnd.go.cd.v2+json";
+in
+
+import ./make-test-python.nix ({ pkgs, ...} : {
+  name = "gocd-agent";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ grahamc swarren83 ];
+
+    # gocd agent needs to register with the autoregister key created on first server startup,
+    # but NixOS module doesn't seem to allow to pass during runtime currently
+    broken = true;
+  };
+
+  nodes = {
+    agent =
+      { ... }:
+      {
+        virtualisation.memorySize = 2046;
+        services.gocd-agent = {
+          enable = true;
+        };
+        services.gocd-server = {
+          enable = true;
+        };
+      };
+  };
+
+  testScript = ''
+    start_all()
+    agent.wait_for_unit("gocd-server")
+    agent.wait_for_open_port("8153")
+    agent.wait_for_unit("gocd-agent")
+    agent.wait_until_succeeds(
+        "curl ${serverUrl} -H '${header}' | ${pkgs.jq}/bin/jq -e ._embedded.agents[0].uuid"
+    )
+    agent.succeed(
+        "curl ${serverUrl} -H '${header}' | ${pkgs.jq}/bin/jq -e ._embedded.agents[0].agent_state | grep Idle"
+    )
+  '';
+})