Add List.Chars to bootstrap modules
Add List.Chars to bootstrap modules

If there is a compile error, Kernel.ParallelCompiler raises
`** (UndefinedFunctionError) function List.Chars.to_charlist/1 is
undefined (module List.Chars is not available)`.

ggcampinho/elixir,kelvinst/elixir,joshprice/elixir,kimshrier/elixir,michalmuskala/elixir,ggcampinho/elixir,pedrosnk/elixir,kelvinst/elixir,pedrosnk/elixir,elixir-lang/elixir,kimshrier/elixir