[AArch64] Relax TLS local dynamic traditional into local executable

[Nick Clifton]

Hi Jiong,

> 2015-08-25  Jiong Wang  <jiong.wang@arm.com>
>
> bfd/
>    * elfnn-aarch64.c (aarch64_tls_transition_without_check): Support
>    three TLS local dynamic traditional relocations types.
>    (elfNN_aarch64_tls_relax): Support TLS local dynamic traditional to
>    local executable relaxation.
>
> ld/testsuite/
>    * ld-aarch64/tls-relax-ld-le-tiny.s: New testcase.
>    * ld-aarch64/tls-relax-ld-le-small.s: Likewise.
>    * ld-aarch64/tls-relax-ld-le-tiny.d: New expectation file.
>    * ld-aarch64/tls-relax-ld-le-small.d: Likewise.
>    * ld-aarch64/aarch64-elf.exp: Run new testcases.

Approved - please apply.

Cheers
   Nick