Some functionality in hack/lib is currently depended on by
cluster/common.sh so kube-up from the full release tar (which
does not include hack/) is currently broken. With this PR we
create cluster/lib/ and move the necessary bits from hack/
over to get kube-up working again.

Fixes: 96d1b8d1Signed-off-by: Mike Danese <mikedanese@google.com>