[PATCH] Add sysdeps/x86/i686

[Roland McGrath]

> I'd like to put common sources between i686 and x86-64 under
> sysdeps/x86/i686 instead of duplicating them.  I have a patch
> to move common x86 multiarch sources to sysdeps/x86/i686/multiarch.

If you are adding #ifdef's then they are not really common.  If there
are things where the exact same source is used, and more than just a
few of them, then that is a compelling reason to add a new shared
sysdeps directory.  Let's start with just those pure cases.