[13/16][binutils][AARCH64]Add relocation support for large memory model. [BFD]Add TLSGD relaxation support

[Nick Clifton]

Hi Renlin,

> bfd/ChangeLog:
> 2015-09-08  Renlin Li <renlin.li@arm.com>
>
>      * elfnn-aarch64.c(IS_AARCH64_TLS_RELAX_RELOC):
>      Add relaxation support for TLSGD_MOVW_G0_NC and TLSGD_MOVW_G1.
>      (aarch64_tls_transition_without_check): Likewise
>      (elfNN_aarch64_tls_relax): Likwise.
>
> ld/testsuite/ChangeLog:
> 2015-09-08  Renlin Li <renlin.li@arm.com>
>
>      * ld-aarch64/aarch64-elf.exp: run new test
>      * ld-aarch64/tls-relax-large-gd-ie.d: New.
>      * ld-aarch64/tls-relax-large-gd-ie.s: New.
>      * ld-aarch64/tls-relax-large-gd-le.d: New.
>      * ld-aarch64/tls-relax-large-gd-le.s: New.

Approved - please apply.

Cheers
   Nick