[init] trigger late_start on property change

Android's late_start is triggered by mount_all. Mer omits running mount_all
and does its own fs setup.

This will spawn a service which will trigger late_start in Android's init.

Signed-off-by: Simonas Leleiva <simonas.leleiva@jollamobile.com>
Merge pull request #1 from sledges/master

[init] trigger late_start on property change