8516 Suppress gcc errors with -Wno- in Makefile for usr/src/cmd

*** 16,25 ****
--- 16,26 ----
  # fields enclosed by brackets "[]" replaced with your own identifying
  # information: Portions Copyright [yyyy] [name of copyright owner]
  #
  # CDDL HEADER END
  #
+ # Copyright 2017 Gary Mills
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
  
  PROG=           syslogd
*** 39,48 ****
--- 40,52 ----
  CFLAGS          += -DNDEBUG
  
  # there's some extra utility code defined but not used.
  LINTFLAGS       += -erroff=E_NAME_DEF_NOT_USED2
  
+ # Suppress error for: prev
+ list.o          := CERRWARN += -_gcc=-Wno-unused-but-set-variable
+ 
  VARSYSLOG=      syslog
  VARAUTHLOG=     authlog
  ROOTVARLOGD=    $(ROOT)/var/log
  
  ROOTETCCONFIG=  $(CONFIGFILE:%=$(ROOTETC)/%)