Update on using LLVM's lld linker in the FreeBSD base system

[Warner Losh]

>> Generally, I like it though. My concerns are mostly with ports and gcc plans.
>> Though it isn't coupled to gcc, I'd suggest that we want to have a joint plan
>> for both before we get out the axes. Note this is purely a timing argument,
>> not whether to get them out, just when :)
>
> Yes, fully agree. I want to have lld available as soon as is feasible,
> but have no intention of trying to remove old GNU ld or GCC 4.2 until
> a viable path forward exists for all architectures.

Agreed. We don't have to have a plan for removal before moving forward
on lld.

Warner