objdump improvements for mips elf64

[Nick Clifton]

Hi Alex,

> Index: bfd/ChangeLog
> from  Alexandre Oliva  <aoliva@redhat.com>
> 
> 	* elfxx-target.h (bfd_elfNN_canonicalize_reloc): Make it
> 	overridable.
> 	* elf64-mips.c (mips_elf64_canonicalize_reloc,
> 	mips_elf64_get_dynamic_reloc_upper_bound,
> 	mips_elf64_canonicalize_dynamic_reloc): New, adapted from elf.c.
> 	(bfd_elf64_get_canonicalize_reloc,
> 	bfd_elf64_get_dynamic_reloc_upper_bound,
> 	bfd_elf64_canonicalize_dynamic_reloc): Define.
> 	(mips_elf64_slurp_reloc_table): Support dynamic.
> 	(mips_elf64_slurp_one_reloc_table): Adjust.

Approved - please apply.

Cheers
       Nick