init: added missing permissions

Else PerformanceControl will not be able to change them
-scaling_min_freq
-scaling_governor
-I/O scheduler

Change-Id: I55eb68087e991a906d91009b0a9bc43f0b162635
init: fixup cpufreq permissions

It is safe to have read permissions for everyone
Also required for the CPU info overlay service

PS3:
add cpu0-cpu3

PS4:
mke this work on at least a few devices :)

Change-Id: I1de067f63121a8a19f29d4e994fbc3bf73054556
rootdir: Allow to use a custom environ.rc

This is helpful for device which relies on blobs that needs their dependencies to be placed on a different dir

Change-Id: Ic5ebb7abe6ea97599c28c8a0d61350358b18fda6

Conflicts:
	rootdir/Android.mk