Additional build dependencies for gcc (and the kitchen sink)

This branch started off as a place to stash my collection of packages that I wanted as a result of getting GCC built with hashstack. I've been using a large chunk of these tools on a fairly regular daily basis and they appear to be in a reasonable state on ubuntu precise.

The primary things that this branch brings are

- autoconf/automake
- binutils
- autogen
- texinfo
- perl
- openssh-hpn
- tcl/tk

I'm not sure how one would approach merging this branch. Hopefully others will find this branch useful.