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/development/compilers/chicken/5/default.nix

@@ -0,0 +1,21 @@
+{ lib, newScope } :
+let
+  callPackage = newScope self;
+
+  self = {
+    pkgs = self;
+
+    fetchegg = callPackage ./fetchegg { };
+
+    eggDerivation = callPackage ./eggDerivation.nix { };
+
+    chicken = callPackage ./chicken.nix {
+      bootstrap-chicken = self.chicken.override { bootstrap-chicken = null; };
+    };
+
+    chickenEggs = lib.recurseIntoAttrs (callPackage ./eggs.nix { });
+
+    egg2nix = callPackage ./egg2nix.nix { };
+  };
+
+in lib.recurseIntoAttrs self