Healthd: charger: allow override of LED/BACKLIGHT paths

Change-Id: Ib7372e441d554e16ffc20ce43993ee78cdc5b187
set /system/etc/init.d/* permissions

ported from CM7

Change-Id: I279d78679f7d779d6cd6bbc6c834d94706937ae8
Merge pull request #3 from CyanogenMod/cm-12.0

Merge updates