ivs: add loci logger
ivs: add loci logger

This is the function LOCI will call when it needs to log something.

harshsin/ivs,vezril/ivs,harshsin/ivs,vezril/ivs,harshsin/ivs,harshsin/ivs,vezril/ivs,floodlight/ivs,floodlight/ivs,floodlight/ivs