[erlang-patches] Support callback attributes in erl_pp

[Anthony Ramine]

Hello,

This commit adds proper pretty-printing of callback attributes in erl_pp.

	git fetch https://github.com/nox/otp.git erl_pp-callback

	https://github.com/nox/otp/compare/erlang:maint...erl_pp-callback
	https://github.com/nox/otp/compare/erlang:maint...erl_pp-callback.patch

Regards,

-- 
Anthony Ramine