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.
  
  SRCS    =       iscii91%UTF-8.c \
                  UTF-8%iscii91.c \
                  iscii91%pc-iscii.c \
                  pc-iscii%iscii91.c \
*** 34,39 ****
--- 35,43 ----
  
  include $(SRC)/lib/iconv_modules/Makefile.iconv
  
  CFLAGS += -I../include
  
+ # needs work
+ SMOFF += index_overflow
+ 
  all: $(PROGS)