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>

pkgs/desktops/pantheon/services/pantheon-agent-polkit/default.nix

@@ -0,0 +1,55 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, nix-update-script
+, pkg-config
+, meson
+, ninja
+, vala
+, gtk3
+, libgee
+, granite
+, polkit
+, wrapGAppsHook
+}:
+
+stdenv.mkDerivation rec {
+  pname = "pantheon-agent-polkit";
+  version = "1.0.5";
+
+  src = fetchFromGitHub {
+    owner = "elementary";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-sC+Ec8a/17EfHsSRKQflBlzv9XAFjUVhjX691gIVa2A=";
+  };
+
+  nativeBuildInputs = [
+    meson
+    ninja
+    pkg-config
+    vala
+    wrapGAppsHook
+  ];
+
+  buildInputs = [
+    granite
+    gtk3
+    libgee
+    polkit
+  ];
+
+  passthru = {
+    updateScript = nix-update-script {
+      attrPath = "pantheon.${pname}";
+    };
+  };
+
+  meta = with lib; {
+    description = "Polkit Agent for the Pantheon Desktop";
+    homepage = "https://github.com/elementary/pantheon-agent-polkit";
+    license = licenses.lgpl21Plus;
+    platforms = platforms.linux;
+    maintainers = teams.pantheon.members;
+  };
+}