10080 smatch Makefile changes for usr/src/cmd

*** 20,29 ****
--- 20,30 ----
  # CDDL HEADER END
  #
  #
  # Copyright (c) 1989 by Sun Microsystems, Inc.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  FSTYPE=         hsfs
  LIBPROG=        labelit
  ATTMK=          $(LIBPROG)
  
*** 31,38 ****
--- 32,42 ----
  
  CERRWARN += -_gcc=-Wno-switch
  CERRWARN += -_gcc=-Wno-implicit-function-declaration
  CERRWARN += -_gcc=-Wno-unused-variable
  
+ # not linted
+ SMATCH=off
+ 
  lint := PROG = $(LIBPROG)
  
  lint:   lint_PROG