Add bmap-tools-3.2 as archivers/bmap-tools

Bmaptool is a generic tool for creating the block map (bmap) for
a file and copying files using the block map. The idea is that
large files, like raw system image files, can be copied or flashed
a lot faster and more reliably with bmaptool than with traditional
tools, like "dd" or "cp".

(jakllsch)