10080 smatch Makefile changes for usr/src/cmd

*** 21,31 ****
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
  # Copyright (c) 2013 by Delphix. All rights reserved.
! # Copyright 2015, Joyent, Inc.
  #
  
  .KEEP_STATE:
  .SUFFIXES:
  
--- 21,31 ----
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
  # Copyright (c) 2013 by Delphix. All rights reserved.
! # Copyright (c) 2018, Joyent, Inc.
  #
  
  .KEEP_STATE:
  .SUFFIXES:
  
*** 121,130 ****
--- 121,132 ----
  LDFLAGS                 += $(ZTEXT)
  LDFLAGS64               += $(ZTEXT)
  ASFLAGS                 += -P
  AS_CPPFLAGS             += -D_ASM
  
+ SMOFF += all_func_returns,index_overflow
+ 
  # Module type-specific compiler flags
  $(MODOBJS) :=                   CFLAGS += $(C_BIGPICFLAGS) $(XREGSFLAG)
  $(MODOBJS) :=                   CFLAGS64 += $(C_BIGPICFLAGS) $(XREGSFLAG)
  $(KMODOBJS) $(KLINTOBJS) :=     CPPFLAGS += -D_KMDB
  $(KMODOBJS) :=                  V9CODESIZE = $(CCABS32)