[patch] Drop support for non-cfi capable assemblers

[Rafael Espíndola]

>> >> Not unless IAS is made default on PowerPC and SPARC.
>> >
>> > Really? Do you support configurations on which this is relevant?
>>
>> Yes.
>
> Could we activate the integrated assembler by default on these systems? I believe that in general, while we're missing instruction definitions for a number of instructions supported by newer assemblers, we should have definitions for essentially all instructions supported by assemblers old enough not to have CFI support.

I am pretty sure we can flip it for PowerPC since it is already used
by some of the BSDs. I don't think we should hold back on needing to
support really old assemblers for Sparc. Brad, what prevents you from
upgrading gas?

Cheers,
Rafael