Do not append version number to path when extracting packages
Do not append version number to path when extracting packages

Previously, we would end up with one directory per version, leading
to a waste of disk space.

Also, this breaks the bison package which uses a
export M4=../../m4/bin/m4 hack

Change-Id: I205e64037d202cbb41ce8bdd1b460ff1169d92e3

aldebaran/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild