[PATCH binutils] Add support for the aarch64-gnu target (GNU/Hurd on AArch64)

[Nick Clifton]

Hi Sergey,

> Also recognized are aarch64-*-gnu tagrets, e.g. aarch64-pc-gnu or
> aarch64-unknown-gnu.
> 
> The ld/emulparams/aarch64gnu.sh file is (for now) identical to aarch64fbsd.sh,
> or to aarch64linux.sh with Linux-specific logic removed; and mainly different
> from the generic aarch64elf.sh in that it does not set EMBEDDED=yes.
> 
> Coupled with a corresponding GCC patch, this produces a toolchain that can
> sucessfully build working binaries targeting aarch64-gnu.
  Approved - please apply.

Cheers
   Nick