tweak header doc in FullyConnected
tweak header doc in FullyConnected

szagoruyko/clnn,brunoro/clnn,szagoruyko/clnn,hughperkins/clnn,brunoro/clnn,brunoro/clnn,hughperkins/clnn,szagoruyko/clnn,szagoruyko/clnn,hughperkins/clnn,brunoro/clnn,hughperkins/clnn