Try a more specific approach to avoid mac linkage errors with dual -Wl,-executable_path flags on the linker commandline

layout/tools/reftest/Makefile.in

@@ -86,7 +86,7 @@ endif
 EXTRA_DSO_LDOPTS = \
 	$(LIBS_DIR) \
 	$(EXTRA_DSO_LIBS) \
-	$(XPCOM_GLUE_LDOPTS) \
+	$(DIST)/lib/$(LIB_PREFIX)xpcomglue_s.$(LIB_SUFFIX) \
 	$(MOZ_COMPONENT_LIBS) \
 	$(ZLIB_LIBS) \
 	$(NULL)