Bug 389232 Firefox build fails on OpenSolaris with enable-libxul

r=wtc sr=benjamin

toolkit/library/Makefile.in

@@ -173,7 +173,7 @@ include $(topsrcdir)/config/rules.mk
 export:: $(RDF_UTIL_SRC_CPPSRCS) $(INTL_UNICHARUTIL_UTIL_CPPSRCS)
 	$(INSTALL) $^ .
 
-EXTRA_DSO_LDOPTS += $(EXTRA_DSO_LIBS)
+EXTRA_DSO_LDOPTS += $(LIBS_DIR) $(EXTRA_DSO_LIBS)
 
 ifdef MOZ_ENABLE_LIBXUL
 include $(srcdir)/libxul-rules.mk