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/kubicorn/default.nix

@@ -0,0 +1,26 @@
+{ lib, buildGoPackage, fetchFromGitHub }:
+
+with lib;
+
+buildGoPackage rec {
+  pname = "kubicorn";
+  version = "2018-10-13-${lib.strings.substring 0 7 rev}";
+  rev = "4c7f3623e9188fba43778271afe161a4facfb657";
+
+  src = fetchFromGitHub {
+    rev = rev;
+    owner = "kubicorn";
+    repo = "kubicorn";
+    sha256 = "18h5sj4lcivrwjq2hzn7c3g4mblw17zicb5nma8sh7sakwzyg1k9";
+  };
+
+  subPackages = ["."];
+  goPackagePath = "github.com/kubicorn/kubicorn";
+
+  meta = {
+    description = "Simple, cloud native infrastructure for Kubernetes";
+    homepage = "http://kubicorn.io/";
+    maintainers = with lib.maintainers; [ offline ];
+    license = lib.licenses.asl20;
+  };
+}