10079 smatch Makefile changes for usr/src/lib

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  LIBRARY =       libcfgadm.a
  VERS =          .1
  OBJECTS =       config_admin.o
  
*** 37,46 ****
--- 38,49 ----
  
  CFLAGS +=       $(CCVERBOSE)
  CERRWARN +=     -_gcc=-Wno-type-limits
  CERRWARN +=     -_gcc=-Wno-unused-label
  
+ SMOFF += snprintf_overflow
+ 
  .KEEP_STATE:
  
  all: $(LIBS)
  
  lint: lintcheck