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/specialisation.nix

@@ -0,0 +1,43 @@
+import ./make-test-python.nix {
+  name = "specialisation";
+  nodes =  {
+    inheritconf = { pkgs, ... }: {
+      environment.systemPackages = [ pkgs.cowsay ];
+      specialisation.inheritconf.configuration = { pkgs, ... }: {
+        environment.systemPackages = [ pkgs.hello ];
+      };
+    };
+    noinheritconf = { pkgs, ... }: {
+      environment.systemPackages = [ pkgs.cowsay ];
+      specialisation.noinheritconf = {
+        inheritParentConfig = false;
+        configuration = { pkgs, ... }: {
+          environment.systemPackages = [ pkgs.hello ];
+        };
+      };
+    };
+  };
+  testScript = ''
+    inheritconf.wait_for_unit("default.target")
+    inheritconf.succeed("cowsay hey")
+    inheritconf.fail("hello")
+
+    with subtest("Nested clones do inherit from parent"):
+        inheritconf.succeed(
+            "/run/current-system/specialisation/inheritconf/bin/switch-to-configuration test"
+        )
+        inheritconf.succeed("cowsay hey")
+        inheritconf.succeed("hello")
+
+        noinheritconf.wait_for_unit("default.target")
+        noinheritconf.succeed("cowsay hey")
+        noinheritconf.fail("hello")
+
+    with subtest("Nested children do not inherit from parent"):
+        noinheritconf.succeed(
+            "/run/current-system/specialisation/noinheritconf/bin/switch-to-configuration test"
+        )
+        noinheritconf.fail("cowsay hey")
+        noinheritconf.succeed("hello")
+  '';
+}