Remove the final link lists at the beginning of each build to catch config & library name changes

config/Makefile.in

@@ -78,6 +78,7 @@ ifeq ($(MOZ_OS2_TOOLS),VACPP)
 	$(INSTALL) -m 444 $(srcdir)/os2/dirent.h  $(DIST)/include
 	$(INSTALL) -m 444 $(srcdir)/os2/getopt.h  $(DIST)/include
 endif
+	-rm -f $(FINAL_LINK_COMPS) $(FINAL_LINK_LIBS) $(FINAL_LINK_COMP_NAMES)
 
 GARBAGE += build_number nsBuildId.h