12312 fix unused lib dependencies

*** 19,29 ****
  # CDDL HEADER END
  #
  #
  # Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved.
  #
! # Copyright (c) 2018, Joyent, Inc.
  
  NETYPPROG =     rpc.yppasswdd
  DEFAULTFILES =  yppasswdd.dfl
  PROG =          $(NETYPPROG)
  
--- 19,29 ----
  # CDDL HEADER END
  #
  #
  # Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved.
  #
! # Copyright 2020 Joyent, Inc.
  
  NETYPPROG =     rpc.yppasswdd
  DEFAULTFILES =  yppasswdd.dfl
  PROG =          $(NETYPPROG)
  
*** 43,52 ****
--- 43,54 ----
  #LDLIBS +=      -lrpcsvc -lnsl -lcrypt -lintl -lgen
  LDLIBS +=       -lnsl -lnisdb -lc
  MAPFILES =      $(MAPFILE.INT) $(MAPFILE.NGB)
  LDFLAGS +=      $(MAPFILES:%=-M%)
  
+ ZGUIDANCE =     -zguidance=nounused
+ 
  # Pick up includes from library
  CPPFLAGS += -I$(SRC)/lib/libnisdb/yptol
  
  # This file is now in the $(SRC)/head/rpcsvc directory.
  #HDRFILE= yppasswd.h
*** 101,112 ****
          $(INS.file)
  
  clean:
          $(RM) $(OBJS)
  
- lint:   lint_SRCS
- 
  check: $(CHKMANIFEST)
  
  cstyle:
          ${CSTYLE} ${SRCS}
  
--- 103,112 ----