10080 smatch Makefile changes for usr/src/cmd

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  # Copyright (c) 2016, Chris Fraire <cfraire@me.com>.
+ # Copyright (c) 2018, Joyent, Inc.
  #
  
  PROG    = dhcpagent
  ROOTFS_PROG = $(PROG)
  DEFAULTFILES = dhcpagent.dfl
*** 39,48 ****
--- 40,52 ----
  XGETFLAGS += -a -x dhcpagent.xcl
  
  CERRWARN += -_gcc=-Wno-switch
  CERRWARN += -_gcc=-Wno-parentheses
  
+ # not linted
+ SMATCH=off
+ 
  #
  # to compile a debug version, do a `make COPTFLAG="-g -XO0"'
  #
  
  CPPFLAGS  += -D_XOPEN_SOURCE=500 -D__EXTENSIONS__