10080 smatch Makefile changes for usr/src/cmd

*** 16,30 ****
  # fields enclosed by brackets "[]" replaced with your own identifying
  # information: Portions Copyright [yyyy] [name of copyright owner]
  #
  # CDDL HEADER END
  #
- 
- #
  # Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
  
  PROG=           dladm
  ROOTFS_PROG=    $(PROG)
  OBJS=           dladm.o
  
--- 16,29 ----
  # fields enclosed by brackets "[]" replaced with your own identifying
  # information: Portions Copyright [yyyy] [name of copyright owner]
  #
  # CDDL HEADER END
  #
  # Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  PROG=           dladm
  ROOTFS_PROG=    $(PROG)
  OBJS=           dladm.o
  
*** 43,52 ****
--- 42,53 ----
  
  CERRWARN +=     -_gcc=-Wno-switch
  CERRWARN +=     -_gcc=-Wno-unused-label
  CERRWARN +=     -_gcc=-Wno-uninitialized
  
+ SMOFF += snprintf_overflow
+ 
  # For headers from librstp.
  LINTFLAGS +=    -erroff=E_TRAILING_COMMA_IN_ENUM
  lint :=         ZLAZYLOAD=
  lint :=         ZNOLAZYLOAD=