Update makefile clean
Update makefile clean

elixir-lang/elixir,beedub/elixir,michalmuskala/elixir,lexmag/elixir,kimshrier/elixir,joshprice/elixir,antipax/elixir,ggcampinho/elixir,pedrosnk/elixir,ggcampinho/elixir,kimshrier/elixir,gfvcastro/elixir,lexmag/elixir,kelvinst/elixir,beedub/elixir,gfvcastro/elixir,pedrosnk/elixir,kelvinst/elixir,antipax/elixir