Incorporated msp430/cppbsl into tinyos-tools

This folder had many committed Makefiles and the like, as well as its
own bootstrap/configure setup. I merged this into the main tinyos-tools
configure build process and removed the autogenerated code. cppbsl also
needs a library I didn't have on my system and rather than add another
dependency to tinyos-tools, cppbsl will only install if the user already
has libpopt.