Ensure Phoenix works with always on protocol consolidation from Elixir master

[josevalim]

if res == :ok && consolidate_protocols?() do
  Mix.Task.run "compile.protocols", args
end

where:

defp consolidate_protocols? do
  Mix.Project.config[:consolidate_protocols]
end

[josevalim]

@chrismccord this would be nice to get into the new release, let me work on it quickly.

[josevalim]

Done, @chrismccord please backport to 1.0.4 before the release.

[josevalim]

Please also include follow up commit: b9c4ed4

[chrismccord]

Done <3 <3 <3