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

*** 17,27 ****
  # information: Portions Copyright [yyyy] [name of copyright owner]
  #
  # CDDL HEADER END
  #
  
! # Copyright (c) 2011 Gary Mills
  
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
--- 17,27 ----
  # information: Portions Copyright [yyyy] [name of copyright owner]
  #
  # CDDL HEADER END
  #
  
! # Copyright (c) 2017 Gary Mills
  
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
*** 39,48 ****
--- 39,51 ----
          recipient.o sasl.o savemail.o sfsasl.o sm_resolve.o srvrsmtp.o stab.o \
          stats.o sysexits.o tls.o trace.o udb.o usersmtp.o util.o version.o
  
  SRCS=   $(OBJS:%.o=%.c)
  
+ # Suppress the error for: align
+ conf.o := CERRWARN += -_gcc=-Wno-unused-but-set-variable
+ 
  MAPFILES =      $(MAPFILE.INT) $(MAPFILE.NGB)
  LDFLAGS +=      $(MAPFILES:%=-M%)
  
  LDLIBS +=       ../libsmutil/libsmutil.a ../libsm/libsm.a -lresolv -lsocket \
                  -lnsl ../db/libdb.a -lldap -lsldap -lwrap -lumem \