[10/16][binutils][AARCH64]Add relocation support for large memory model. [LD]Add BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC support.

[Nick Clifton]

Hi Renlin,

> bfd/ChangeLog:
> 2015-09-08  Renlin Li <renlin.li@arm.com>
>
>      * elfnn-aarch64.c (aarch64_reloc_got_type): Add
>          BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC support.
>      (elfNN_aarch64_final_link_relocate): Likewise.
>      (elfNN_aarch64_relocate_section): Likewise.
>      (elfNN_aarch64_gc_sweep_hook): Likewise.
>      (elfNN_aarch64_check_relocs): Likewise.
>      * elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise.
>      (_bfd_aarch64_elf_resolve_relocation): Likewise.
>
> ld/testsuite/ChangeLog:
> 2015-09-08  Renlin Li <renlin.li@arm.com>
>
>      * ld-aarch64/emit-relocs-516.d: New.
>      * ld-aarch64/emit-relocs-516.s: New.
>      * ld-aarch64/aarch64-elf.exp: Run new test.

Approved - please apply.

Cheers
   Nick