10080 smatch Makefile changes for usr/src/cmd

*** 19,36 ****
--- 19,40 ----
  #
  # CDDL HEADER END
  #
  #
  # Copyright (c) 1989 by Sun Microsystems, Inc.
+ # Copyright (c) 2018, Joyent, Inc.
  #
  
  PROG= exstr
  
  include ../Makefile.cmd
  
  CERRWARN += -_gcc=-Wno-extra
  
+ # "missing type for func"
+ SMATCH=off
+ 
  .KEEP_STATE:
  
  all: $(PROG)
  
  install: all $(ROOTPROG)