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/tinydns.nix

@@ -0,0 +1,40 @@
+import ./make-test-python.nix ({ lib, ...} : {
+  name = "tinydns";
+  meta = {
+    maintainers = with lib.maintainers; [ basvandijk ];
+  };
+  nodes = {
+    nameserver = { config, lib, ... } : let
+      ip = (lib.head config.networking.interfaces.eth1.ipv4.addresses).address;
+    in {
+      networking.nameservers = [ ip ];
+      services.tinydns = {
+        enable = true;
+        inherit ip;
+        data = ''
+          .foo.bar:${ip}
+          +.bla.foo.bar:1.2.3.4:300
+        '';
+      };
+    };
+  };
+  testScript = ''
+    nameserver.start()
+    nameserver.wait_for_unit("tinydns.service")
+
+    # We query tinydns a few times to trigger the bug:
+    #
+    #   nameserver # [    6.105872] mmap: tinydns (842): VmData 331776 exceed data ulimit 300000. Update limits or use boot option ignore_rlimit_data.
+    #
+    # which was reported in https://github.com/NixOS/nixpkgs/issues/119066.
+    # Without the patch <nixpkgs/pkgs/tools/networking/djbdns/softlimit.patch>
+    # it fails on the 10th iteration.
+    nameserver.succeed(
+        """
+          for i in {1..100}; do
+            host bla.foo.bar 192.168.1.1 | grep '1\.2\.3\.4'
+          done
+        """
+    )
+  '';
+})