gold alignment for 64-bit target in 32-bit binary

[David Miller]

From: Ian Lance Taylor <iant@google.com>
Date: Wed, 23 Apr 2008 10:31:35 -0700

> Ah, thanks.  That code was written before the mmap support, and it is
> now outdated.  I committed the appended patch which should fix the
> problem, and should make gold infinitesimally faster.

Thanks for fixing this Ian, I'll put this through it's paces
and let you know if there are any remaining issues in this area.