Merge pull request #1293 from The-OpenROAD-Project-staging/5sdc

Add 5_route.sdc as 6_1_fill dependency

Author: maliberty

flow/Makefile

@@ -722,7 +722,7 @@ elapsed:
 # ==============================================================================
 
 ifneq ($(USE_FILL),)
-$(eval $(call do-step,6_1_fill,$(RESULTS_DIR)/5_route.odb $(FILL_CONFIG),density_fill))
+$(eval $(call do-step,6_1_fill,$(RESULTS_DIR)/5_route.odb $(RESULTS_DIR)/5_route.sdc $(FILL_CONFIG),density_fill))
 else
 $(eval $(call do-copy,6_1_fill,5_route.odb))
 endif