[PATCH] make ld-elf/eh[1-4] tests assume less about x86_64 targets

[nick clifton]

Hi Roland,

> ld/testsuite/
> 2012-04-06  Roland McGrath<mcgrathr@google.com>
>
> 	* ld-elf/eh1.d: Add explicit --64 to as options, and explicit
> 	-melf_x86_64 and -Ttext to ld options, so we don't assume every
> 	x86_64-*-* target uses --64 (vs --x32) by default or has the
> 	same address space layout.
> 	* ld-elf/eh2.d: Likewise.
> 	* ld-elf/eh3.d: Likewise.
> 	* ld-elf/eh4.d: Likewise.
> 	* ld-elf/elf.exp: For target *-*-nacl*, use options_regsub(ld) to
> 	map -melf_x86_64 to -melf_x86_64_nacl.

Approved - please apply.

Cheers
   Nick