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

@@ -83,5 +83,6 @@
 CSTD=           $(CSTD_GNU99)
 
 CPPFLAGS +=     -DOSNAME="\"illumos\"" -D_FILE_OFFSET_BITS=64
 
 LDLIBS +=       -lz
+ADJUNCT_LIBS += libz.so