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/doh-proxy-rust.nix

@@ -0,0 +1,43 @@
+import ./make-test-python.nix ({ lib, pkgs, ... }: {
+  name = "doh-proxy-rust";
+  meta = with lib.maintainers; {
+    maintainers = [ stephank ];
+  };
+
+  nodes = {
+    machine = { pkgs, lib, ... }: {
+      services.bind = {
+        enable = true;
+        extraOptions = "empty-zones-enable no;";
+        zones = lib.singleton {
+          name = ".";
+          master = true;
+          file = pkgs.writeText "root.zone" ''
+            $TTL 3600
+            . IN SOA ns.example.org. admin.example.org. ( 1 3h 1h 1w 1d )
+            . IN NS ns.example.org.
+            ns.example.org. IN A    192.168.0.1
+          '';
+        };
+      };
+      services.doh-proxy-rust = {
+        enable = true;
+        flags = [
+          "--server-address=127.0.0.1:53"
+        ];
+      };
+    };
+  };
+
+  testScript = { nodes, ... }: ''
+    url = "http://localhost:3000/dns-query"
+    query = "AAABAAABAAAAAAAAAm5zB2V4YW1wbGUDb3JnAAABAAE="  # IN A ns.example.org.
+    bin_ip = r"$'\xC0\xA8\x00\x01'"  # 192.168.0.1, as shell binary string
+
+    machine.wait_for_unit("bind.service")
+    machine.wait_for_unit("doh-proxy-rust.service")
+    machine.wait_for_open_port(53)
+    machine.wait_for_open_port(3000)
+    machine.succeed(f"curl --fail -H 'Accept: application/dns-message' '{url}?dns={query}' | grep -F {bin_ip}")
+  '';
+})