10080 smatch Makefile changes for usr/src/cmd

*** 21,30 ****
--- 21,31 ----
  #
  #
  # Copyright 1994, 2002 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  PROG = mknetid
  
  include ../../Makefile.cmd
  
*** 35,44 ****
--- 36,48 ----
  
  CERRWARN += -_gcc=-Wno-implicit-function-declaration
  CERRWARN += -_gcc=-Wno-parentheses
  CERRWARN += -_gcc=-Wno-unused-function
  
+ # not linted
+ SMATCH=off
+ 
  .KEEP_STATE:
  
  all: $(PROG) 
  
  $(PROG): $(OBJS)