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/emacs-daemon.nix

@@ -0,0 +1,48 @@
+import ./make-test-python.nix ({ pkgs, ...} : {
+  name = "emacs-daemon";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ ];
+  };
+
+  enableOCR = true;
+
+  nodes.machine =
+    { ... }:
+
+    { imports = [ ./common/x11.nix ];
+      services.emacs = {
+        enable = true;
+        defaultEditor = true;
+      };
+
+      # Important to get the systemd service running for root
+      environment.variables.XDG_RUNTIME_DIR = "/run/user/0";
+
+      environment.variables.TEST_SYSTEM_VARIABLE = "system variable";
+    };
+
+  testScript = ''
+      machine.wait_for_unit("multi-user.target")
+
+      # checks that the EDITOR environment variable is set
+      machine.succeed('test $(basename "$EDITOR") = emacseditor')
+
+      # waits for the emacs service to be ready
+      machine.wait_until_succeeds(
+          "systemctl --user status emacs.service | grep 'Active: active'"
+      )
+
+      # connects to the daemon
+      machine.succeed("emacsclient --no-wait --frame-parameters='((display . \"'\"$DISPLAY\"'\"))' --create-frame $EDITOR >&2")
+
+      # checks that Emacs shows the edited filename
+      machine.wait_for_text("emacseditor")
+
+      # makes sure environment variables are accessible from Emacs
+      machine.succeed(
+          "emacsclient --eval '(getenv \"TEST_SYSTEM_VARIABLE\")' | grep -q 'system variable'"
+      )
+
+      machine.screenshot("emacsclient")
+    '';
+})