[PATCH] Implement some missing relocs for X86_64

[Eric Christopher]

>>! In D6235#8, @rafaelauler wrote:
> +rafael
> 
> Does LLVM generate these "non-ABI-conformant" relocations? Do they need to
> be supported by LLD? The relocations are R_X86_64_8, R_X86_64_16,
> R_X86_64_PC16 and R_X86_64_PC8.

I've rarely seen them in the wild but if you've already code the code then handling them isn't a problem.

-eric

http://reviews.llvm.org/D6235