10076 make usr/src/test smatch clean

*** 10,20 ****
  #
  
  #
  # Copyright (c) 2012 by Delphix. All rights reserved.
  # Copyright 2015 Garrett D'Amore <garrett@damore.org>
! # Copyright 2016 Joyent, Inc.
  #
  
  SUBDIRS = \
          catopen \
          fpround \
--- 10,20 ----
  #
  
  #
  # Copyright (c) 2012 by Delphix. All rights reserved.
  # Copyright 2015 Garrett D'Amore <garrett@damore.org>
! # Copyright (c) 2018, Joyent, Inc.
  #
  
  SUBDIRS = \
          catopen \
          fpround \
*** 54,63 ****
--- 54,66 ----
          quick_exit \
          psignal
  
  CPPFLAGS += -D_REENTRANT
  
+ # needs work
+ SMOFF += all_func_returns,snprintf_overflow
+ 
  PROGS32 = $(PROGS:%=%.32)
  PROGS64 = \
          $(PROGS:%=%.64) \
          printf-6961.64