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/nexus.nix

@@ -0,0 +1,32 @@
+# verifies:
+#   1. nexus service starts on server
+#   2. nexus service can startup on server (creating database and all other initial stuff)
+#   3. the web application is reachable via HTTP
+
+import ./make-test-python.nix ({ pkgs, ...} : {
+  name = "nexus";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ ironpinguin ];
+  };
+
+  nodes = {
+
+    server =
+      { ... }:
+      { virtualisation.memorySize = 2047; # qemu-system-i386 has a 2047M limit
+        virtualisation.diskSize = 8192;
+
+        services.nexus.enable = true;
+      };
+
+  };
+
+  testScript = ''
+    start_all()
+
+    server.wait_for_unit("nexus")
+    server.wait_for_open_port(8081)
+
+    server.succeed("curl -f 127.0.0.1:8081")
+  '';
+})