10080 smatch Makefile changes for usr/src/cmd

*** 1,9 ****
--- 1,10 ----
  #
  # Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  #  Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  PROG=           chat
  OBJS=           chat.o
  SRCS=           $(OBJS:%.o=%.c)
  
*** 12,21 ****
--- 13,25 ----
  CPPFLAGS +=     -DSOL2
  LDFLAGS +=      $(MAPFILE.NGB:%=-M%)
  CERRWARN +=     -_gcc=-Wno-unused-value
  CERRWARN +=     -_gcc=-Wno-trigraphs
  
+ # not linted
+ SMATCH=off
+ 
  .KEEP_STATE:
  
  all: $(PROG)
  
  install: all $(ROOTPROG)