8411 Build should warn when linking against libraries outside proto area

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  # Copyright (c) 2013, 2015 by Delphix. All rights reserved.
  # Copyright 2017 Joyent, Inc.
+ # Copyright 2017 RackTop Systems.
  #
  
  LIBRARY= libzpool.a
  VERS= .1
  
*** 66,75 ****
--- 67,79 ----
  CFLAGS +=       -g $(CCVERBOSE) $(CNOGLOBAL)
  CFLAGS64 +=     -g $(CCVERBOSE) $(CNOGLOBAL)
  LDLIBS +=       -lcmdutils -lumem -lavl -lnvpair -lz -lc -lsysevent -lmd
  CPPFLAGS +=     $(INCS) -DDEBUG
  
+ # Allow zlib to be taken from outside the proto area.
+ $(ADJUNCT_PROTO_NOT_SET)DYNFLAGS += $(ZASSERTDEFLIB)=libz.so
+ 
  CERRWARN +=     -_gcc=-Wno-parentheses
  CERRWARN +=     -_gcc=-Wno-switch
  CERRWARN +=     -_gcc=-Wno-type-limits
  CERRWARN +=     -_gcc=-Wno-unused-variable
  CERRWARN +=     -_gcc=-Wno-empty-body