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/data/themes/greybird/default.nix

@@ -0,0 +1,50 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, meson
+, ninja
+, pkg-config
+, sassc
+, gdk-pixbuf
+, librsvg
+, gtk-engine-murrine
+, gitUpdater
+}:
+
+stdenv.mkDerivation rec {
+  pname = "greybird";
+  version = "3.23.1";
+
+  src = fetchFromGitHub {
+    owner = "shimmerproject";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "hfi2TBRrZTSN43tYKMPvb/dWwwUE7RakKTMBziHnCWA=";
+  };
+
+  nativeBuildInputs = [
+    meson
+    ninja
+    pkg-config
+    sassc
+  ];
+
+  buildInputs = [
+    gdk-pixbuf
+    librsvg
+  ];
+
+  propagatedUserEnvPkgs = [
+    gtk-engine-murrine
+  ];
+
+  passthru.updateScript = gitUpdater { inherit pname version; rev-prefix = "v"; };
+
+  meta = with lib; {
+    description = "Grey and blue theme from the Shimmer Project for GTK-based environments";
+    homepage = "https://github.com/shimmerproject/Greybird";
+    license = [ licenses.gpl2Plus ]; # or alternatively: cc-by-nc-sa-30 or later
+    platforms = platforms.linux;
+    maintainers = [ maintainers.romildo ];
+  };
+}