[klibc] ash replaced

[H. Peter Anvin]

I have pushed a new klibc which uses a modern NetBSD-derived ash.  The 
initial port was done by Olaf, and I've mostly applied the chainsaw to 
it until it was less than 50% larger than the old one.

It's still substantially larger, but should also eliminate need for some 
external binaries like expr and test, which are otherwise ubiquitous for 
any sensible shell scripts, and perhaps most importantly, it works 
correctly on 64-bit platforms.

	-hpa