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/xss-lock.nix

@@ -0,0 +1,44 @@
+import ./make-test-python.nix ({ pkgs, lib, ... }:
+
+with lib;
+
+{
+  name = "xss-lock";
+  meta.maintainers = with pkgs.lib.maintainers; [ ];
+
+  nodes = {
+    simple = {
+      imports = [ ./common/x11.nix ./common/user-account.nix ];
+      programs.xss-lock.enable = true;
+      test-support.displayManager.auto.user = "alice";
+    };
+
+    custom_lockcmd = { pkgs, ... }: {
+      imports = [ ./common/x11.nix ./common/user-account.nix ];
+      test-support.displayManager.auto.user = "alice";
+
+      programs.xss-lock = {
+        enable = true;
+        extraOptions = [ "-n" "${pkgs.libnotify}/bin/notify-send 'About to sleep!'"];
+        lockerCommand = "${pkgs.xlockmore}/bin/xlock -mode ant";
+      };
+    };
+  };
+
+  testScript = ''
+    def perform_xsslock_test(machine, lockCmd):
+        machine.start()
+        machine.wait_for_x()
+        machine.wait_for_unit("xss-lock.service", "alice")
+        machine.fail(f"pgrep {lockCmd}")
+        machine.succeed("su -l alice -c 'xset dpms force standby'")
+        machine.wait_until_succeeds(f"pgrep {lockCmd}")
+
+
+    with subtest("simple"):
+        perform_xsslock_test(simple, "i3lock")
+
+    with subtest("custom_cmd"):
+        perform_xsslock_test(custom_lockcmd, "xlock")
+  '';
+})