Fix g5sensord never sleeping & adjust init layout

* Service needs use to system:misc permissions so that libsensors can
  send USR signals to sleep/resume correctly.
* Reorganize init.rc so that post-fs-data is created in correct order, to
  prevent crash of g5sensord service on fresh boot (no /data/misc/sensors)

Conflicts:
	ramdisk/init.msm7x27.rc

(cherry picked from commit 1c14e73c84251857016c398f74f8d19b7b4b9373)

Change-Id: I9f9701da31817ff139b966cdc858d9cc83fc764e