jf-common: init.target.rc: remove 'on fs_selinux'

its not run in CM.

Change-Id: Ie2e0a72b50d52de6dc4f8ec209fcee5fd55360e5
jf-common: mount persdata in fstab

i also corrected 'default' to 'defaults' on the vold mounts while updating fstab

someone should probably advise the best mount flags for this partition.  i just copied verbatim from init.carrier.rc.

Change-Id: I8f3825e96c0e3239c40e00f5dee7b49ddb59c821