set correct permissions for frequencies and governor

Android 4.4 introdcues some kind of new bug, Aero Control
can't read the currently selected governor and min/max
cpu frequencies.
I have seen something similiar on 3.0.8 Kernel, so set
correct permission for those files.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
Version 0.9.4

Signed-off-by: Blechd0se <alex.christ@hotmail.de>