[oe] Revert "busybox: Disable busybox shadow support for Angstrom"

[Graeme Gregory]

> > 2. install /etc/shadow and fully support it (i believe ther is something more to do here)
> 
> 2) is what is wanted for the angstrom 2008 release.
> 
> regards,
> 

Yes it seems the devices we are using Angstrom on now are becoming more
like laptops every day. So we should be following security procedures
for big machines much more.

I mean the latest set of omap3 devices are quite defineately eeePC
competitors.

Graeme