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/systemd-misc.nix

@@ -0,0 +1,62 @@
+import ./make-test-python.nix ({ pkgs, ... }:
+
+let
+  exampleScript = pkgs.writeTextFile {
+    name = "example.sh";
+    text = ''
+      #! ${pkgs.runtimeShell} -e
+
+      while true; do
+          echo "Example script running" >&2
+          ${pkgs.coreutils}/bin/sleep 1
+      done
+    '';
+    executable = true;
+  };
+
+  unitFile = pkgs.writeTextFile {
+    name = "example.service";
+    text = ''
+      [Unit]
+      Description=Example systemd service unit file
+
+      [Service]
+      ExecStart=${exampleScript}
+
+      [Install]
+      WantedBy=multi-user.target
+    '';
+  };
+in
+{
+  name = "systemd-misc";
+
+  nodes.machine = { pkgs, lib, ... }: {
+    boot.extraSystemdUnitPaths = [ "/etc/systemd-rw/system" ];
+
+    users.users.limited = {
+      isNormalUser = true;
+      uid = 1000;
+    };
+
+    systemd.units."user-1000.slice.d/limits.conf" = {
+      text = ''
+        [Slice]
+        TasksAccounting=yes
+        TasksMax=100
+      '';
+    };
+  };
+
+  testScript = ''
+    machine.wait_for_unit("multi-user.target")
+    machine.succeed("mkdir -p /etc/systemd-rw/system")
+    machine.succeed(
+        "cp ${unitFile} /etc/systemd-rw/system/example.service"
+    )
+    machine.succeed("systemctl start example.service")
+    machine.succeed("systemctl status example.service | grep 'Active: active'")
+
+    machine.succeed("systemctl show --property TasksMax --value user-1000.slice | grep 100")
+  '';
+})