Revert ""

This reverts commit d24f2c876a370796f39059a582f5f13c2a1b5438.

Conflicts:
	ddlog.m
	ddloginfo.m
	gcd:async.m
	gcd:main.m
	ios_8.m
	mainthread.m
	property_assign.m
	property_copy.m
	property_retain.m
	property_strong.m
	property_weak.m