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/os-specific/darwin/darwin-stubs/default.nix

@@ -0,0 +1,18 @@
+{ stdenvNoCC, fetchurl }:
+
+stdenvNoCC.mkDerivation {
+  pname = "darwin-stubs";
+  version = "10.12";
+
+  src = fetchurl {
+    url = "https://github.com/NixOS/darwin-stubs/releases/download/v20201216/10.12.tar.gz";
+    sha256 = "1fyd3xig7brkzlzp0ql7vyfj5sp8iy56kgp548mvicqdyw92adgm";
+  };
+
+  dontBuild = true;
+
+  installPhase = ''
+    mkdir $out
+    mv * $out
+  '';
+}