USB: dontaudit init to write to sysfs directory

USB configuration are replaced by configfs on kernel v4.4.
This causes denials for older version when init tries to write
to sysfs directories. Add a dontaudit to init to avoid denial

CRs-Fixed: 1069632

Change-Id: Idad0f1a6bc2b193f69cbc128c08eb20576897bd8