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/gdm/default.nix

@@ -0,0 +1,24 @@
+{ lib, buildGoPackage, fetchFromGitHub }:
+
+buildGoPackage rec {
+  pname = "gdm";
+  version = "1.4";
+
+  goPackagePath = "github.com/sparrc/gdm";
+
+  src = fetchFromGitHub {
+    owner = "sparrc";
+    repo = "gdm";
+    rev = version;
+    sha256 = "0kpqmbg144qcvd8k88j9yx9lrld85ray2viw161xajafk16plvld";
+  };
+
+  goDeps = ./deps.nix;
+
+  meta = with lib; {
+    description = "Minimalist dependency manager for Go written in Go";
+    homepage = "https://github.com/sparrc/gdm";
+    license = licenses.unlicense;
+    maintainers = [ maintainers.mic92 ];
+  };
+}

pkgs/development/tools/gdm/deps.nix

@@ -0,0 +1,12 @@
+# This file was generated by go2nix.
+[
+  {
+    goPackagePath = "golang.org/x/tools";
+    fetch = {
+      type = "git";
+      url = "https://go.googlesource.com/tools";
+      rev = "0d047c8d5a8c3a1c89d9d78511f4ed7aef49ea0c";
+      sha256 = "0ahyxvqy25zpyppmrb7vsad332gmq2cdi7hb0si6ni0cmrlqcfwr";
+    };
+  }
+]