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

@@ -37,10 +37,11 @@
 # it during lint, as well as turning off the warnings lint would generate.
 #
 LDLIBS += -lzfs_jni -lnvpair -lzfs
 all install := LDLIBS += -lxml2
 LINTFLAGS += -xerroff=E_NAME_USED_NOT_DEF2
+ADJUNCT_LIBS = libxml2.so
 
 CPPFLAGS += $(INCS) -D_LARGEFILE64_SOURCE=1 -D_REENTRANT
 $(NOT_RELEASE_BUILD) CPPFLAGS += -DDEBUG
 
 .KEEP_STATE: