5c383b641b
We found that user can mistakenly break system with --builddir option, something like './reloc/build_deb.sh --builddir /'. To avoid that we need to stop removing entire $BUILDDIR, remove directories only we have to clean up before building deb package. See: https://github.com/scylladb/scylla-python3/pull/23#discussion_r707088453 Closes #177