i9500: start gpsd after boot

* gpsd will create /data/system with the wrong permissions if it starts
  before the directory can be created by the init script. This prevents
  access to /data/system by critical processes.

Change-Id: If010a80c2195114b707f650af6613d712e2a0c10
i9500: Restore /data/system permissions

* gpsd will change the permission on /data/system as part of starting
  up and creating /data/system/gps. Change it back if the permission
  changed.

Change-Id: I519dbdcf32c3008ed7b4790730f8b9c9f911aab2