Integrate cleanTmpDir in stage-2-init.sh.
Integrate cleanTmpDir in stage-2-init.sh.

We're using find in order to remove dotfiles, too.

git-svn-id: 71c8032c709790ec749031c4215f8515ac00dc5a@34433 70bd8c7a-acb8-0310-9f0d-9cc1c95dcdbb

bnordgren/nixos,bnordgren/nixos,bnordgren/nixos,bnordgren/nixos,bnordgren/nixos