makefile: add 'make grt', consistent with other stages

now you can run:

make grt
make gui_grt

just like other stages:

make floorplan
make gui_floorplan

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/Makefile

@@ -835,6 +835,10 @@ clean_cts:
 .PHONY: route
 route: $(RESULTS_DIR)/5_route.odb \
        $(RESULTS_DIR)/5_route.sdc
+
+.PHONY: grt
+grt: $(RESULTS_DIR)/5_1_grt.odb
+
 # ==============================================================================