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/morty.nix

@@ -0,0 +1,30 @@
+import ./make-test-python.nix ({ pkgs, ... }:
+
+{
+  name = "morty";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ leenaars ];
+  };
+
+  nodes =
+    { mortyProxyWithKey =
+
+      { ... }:
+      { services.morty = {
+        enable = true;
+        key = "78a9cd0cfee20c672f78427efb2a2a96036027f0";
+        port = 3001;
+        };
+      };
+
+    };
+
+  testScript =
+    { ... }:
+    ''
+      mortyProxyWithKey.wait_for_unit("default.target")
+      mortyProxyWithKey.wait_for_open_port(3001)
+      mortyProxyWithKey.succeed("curl -fL 127.0.0.1:3001 | grep MortyProxy")
+    '';
+
+})