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/tools/gox/default.nix

@@ -0,0 +1,21 @@
+{ lib, buildGoPackage, fetchFromGitHub }:
+
+buildGoPackage rec {
+  pname = "gox";
+  version = "1.0.1";
+
+  goPackagePath = "github.com/mitchellh/gox";
+
+  src = fetchFromGitHub {
+    owner = "mitchellh";
+    repo = "gox";
+    rev = "v${version}";
+    sha256 = "0mkh81hd7kn45dz7b6yhzqsg2mvg1g6pwx89jjigxrnqhyg9vrl7";
+  };
+
+  meta = with lib; {
+    homepage = "https://github.com/mitchellh/gox";
+    description = "A dead simple, no frills Go cross compile tool";
+    license = licenses.mpl20;
+  };
+}