[syslinux] extlinux VPATH build issue

[Zach Carter]

On Fri, 2008-05-30 at 11:10 -0700, H. Peter Anvin wrote:
> Either way, I don't know how useful it is, since have massively
> revamped 
> the Makefiles in the 3.70 branch of the Syslinux development tree
> (see 
> Syslinux 3.70-pre12); this should hopefully avoid this problem as
> well.

Ah.  I see .. is no longer in VPATH anymore.  That should fix it for
good.

Thanks,

-Zach