8411 Build should warn when linking against libraries outside proto area

*** 19,28 ****
--- 19,29 ----
  # CDDL HEADER END
  #
  #
  #
  # Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
+ # Copyright 2017 RackTop Systems.
  #
  
  LIBRARY =       libshare_nfs.a
  VERS =          .1
  NFSLIB_DIR      = $(SRC)/cmd/fs.d/nfs/lib
*** 42,51 ****
--- 43,55 ----
  lintcheck := SRCS = $(LIBSRCS)
  
  LIBS =          $(DYNLIB)
  LDLIBS +=       -lshare -lnsl -lscf -lumem -lc -lxml2
  
+ # Allow libxml2 to be taken from outside the proto area.
+ $(ADJUNCT_PROTO_NOT_SET)DYNFLAGS += $(ZASSERTDEFLIB)=libxml2.so
+ 
  #add nfs/lib directory as part of the include path
  CFLAGS +=       $(CCVERBOSE)
  CERRWARN +=     -_gcc=-Wno-parentheses
  CERRWARN +=     -_gcc=-Wno-switch
  CERRWARN +=     -_gcc=-Wno-unused-variable