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/go2nix/default.nix

@@ -0,0 +1,45 @@
+{ lib, buildGoPackage, go-bindata, gotools, nix-prefetch-git, git, makeWrapper,
+  fetchFromGitHub }:
+
+buildGoPackage rec {
+  pname = "go2nix";
+  version = "1.3.0";
+  rev = "v${version}";
+
+  goPackagePath = "github.com/kamilchm/go2nix";
+
+  src = fetchFromGitHub {
+    inherit rev;
+    owner = "kamilchm";
+    repo = "go2nix";
+    sha256 = "1q61mgngvyl2bnmrqahh3bji402n76c7xwv29lwk007gymzgff0n";
+  };
+
+  goDeps = ./deps.nix;
+
+  outputs = [ "out" "man" ];
+
+  nativeBuildInputs = [ go-bindata gotools makeWrapper ];
+
+  preBuild = "go generate ./...";
+
+  postInstall = ''
+    wrapProgram $out/bin/go2nix \
+      --prefix PATH : ${nix-prefetch-git}/bin \
+      --prefix PATH : ${git}/bin
+
+    mkdir -p $man/share/man/man1
+    cp $src/go2nix.1 $man/share/man/man1
+  '';
+
+  allowGoReference = true;
+
+  doCheck = false; # tries to access the net
+
+  meta = with lib; {
+    description = "Go apps packaging for Nix";
+    homepage = "https://github.com/kamilchm/go2nix";
+    license = licenses.mit;
+    maintainers = with maintainers; [ kamilchm ];
+  };
+}