10080 smatch Makefile changes for usr/src/cmd

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  MODULE = ip.so
  MDBTGT = kvm
  
  MODSRCS = ip.c
*** 32,36 ****
--- 33,40 ----
  include ../../../../Makefile.cmd.64
  include ../../Makefile.amd64
  include ../../../Makefile.module
  
  CPPFLAGS += -I$(SRC)/uts/common/inet
+ 
+ # needs work
+ SMOFF += shift_to_zero