[PATCH 5/5] Gold: Don't fail on R_X86_64_[REX_]GOTPCRELX relocations

[Cary Coutant]

> elfcpp/
>
>         * x86_64.h (R_X86_64_GOTPCRELX): New.
>         (R_X86_64_REX_GOTPCRELX): Likewise.
>
> gold/
>
>         * x86_64.cc (Target_x86_64<size>::Scan::get_reference_flags):
>         Treat R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX the same
>         as R_X86_64_GOTPCREL.
>         (Target_x86_64<size>::Scan::local): Likewise.
>         (Target_x86_64<size>::Scan::possible_function_pointer_reloc):
>         Likewise.
>         (Target_x86_64<size>::Scan::global): Likewise.
>         (Target_x86_64<size>::Relocate::relocate): Likewise.
>         (Target_x86_64<size>::Relocatable_size_for_reloc::get_size_for_reloc):
>         Likewise.

This is OK. Thanks!

-cary