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/gocode/default.nix

@@ -0,0 +1,43 @@
+{ lib, buildGoPackage, fetchFromGitHub }:
+
+buildGoPackage rec {
+  pname = "gocode-unstable";
+  version = "2020-04-06";
+  rev = "4acdcbdea79de6b3dee1c637eca5cbea0fdbe37c";
+
+  goPackagePath = "github.com/mdempsky/gocode";
+
+  # we must allow references to the original `go` package,
+  # because `gocode` needs to dig into $GOROOT to provide completions for the
+  # standard packages.
+  allowGoReference = true;
+
+  src = fetchFromGitHub {
+    inherit rev;
+
+    owner = "mdempsky";
+    repo = "gocode";
+    sha256 = "0i1hc089gb6a4mcgg56vn5l0q96wrlza2n08l4349s3dc2j559fb";
+  };
+
+  goDeps = ./deps.nix;
+
+  meta = with lib; {
+    description = "An autocompletion daemon for the Go programming language";
+    longDescription = ''
+      Gocode is a helper tool which is intended to be integrated with your
+      source code editor, like vim, neovim and emacs. It provides several
+      advanced capabilities, which currently includes:
+
+        - Context-sensitive autocompletion
+
+      It is called daemon, because it uses client/server architecture for
+      caching purposes. In particular, it makes autocompletions very fast.
+      Typical autocompletion time with warm cache is 30ms, which is barely
+      noticeable.
+    '';
+    homepage = "https://github.com/mdempsky/gocode";
+    license = licenses.mit;
+    maintainers = with maintainers; [ kalbasit ];
+  };
+}