Update init.g2.rc: set perms, user, & group for /sys + Add run-parts
as system service. Fixup all EXTERNAL_STORAGE & sdcard locations...
Fix /storage/emulated/legacy/0/0/0/0/0/0/0/0 problem, &
the run-parts permission denied errors.

Change-Id: I079214b2a1ac15be2430544bfbe847906732106b