init.cm: make directory for ssh

Change-Id: I9aa2506bd9bdc6f87d7d5e5153999c9233d126c1
init.cm: Fix sysinit dependencies

sysinit depends on having the filesystems mounted, and userdata
in particular depends on having /data present. Move its startup
to post-fs-data

Change-Id: Iafcc926a3aa310c1afe501d272df5811da500d86