Use new path for erlang builds
Use new path for erlang builds

fcruxen/heroku-buildpack-elixir,camshaft/heroku-buildpack-elixir,yuku-t/heroku-buildpack-elixir,lbarratt/heroku-buildpack-elixir,HashNuke/heroku-buildpack-elixir,hectorip/buildpack-elixir-phoenix,aerosol/heroku-buildpack-elixir,crigor/buildpack-elixir-mix-env,danielberkompas/heroku-buildpack-elixir