9852 enable ld(1) guidance and deflib assertions for the illumos build

@@ -16,10 +16,12 @@
 CMDDIR=         $(SRC)/cmd/vtfontcvt
 
 include         ../Makefile.tools
 include         $(CMDDIR)/Makefile.common
 
+NATIVE_LIBS += libumem.so
+
 .KEEP_STATE:
 
 all:            $(PROG)
 
 install:        all .WAIT $(ROOTONBLDMACHPROG)