minor update (renaming stress -> mstress)

driver/tests/Makefile

@@ -2,27 +2,27 @@ all:
 	$(MAKE) -C basic
 	$(MAKE) -C demo
 	$(MAKE) -C dogfood
-	$(MAKE) -C stress
+	$(MAKE) -C mstress
 	$(MAKE) -C io_addr
 
 run:
 	$(MAKE) -C basic run-vlsim
 	$(MAKE) -C demo run-vlsim
 	$(MAKE) -C dogfood run-vlsim
-	$(MAKE) -C stress run-vlsim
+	$(MAKE) -C mstress run-vlsim
 	$(MAKE) -C io_addr run-vlsim
 
 clean:
 	$(MAKE) -C basic clean
 	$(MAKE) -C demo clean
 	$(MAKE) -C dogfood clean
-	$(MAKE) -C stress clean
+	$(MAKE) -C mstress clean
 	$(MAKE) -C io_addr clean
 
 clean-all:
 	$(MAKE) -C basic clean-all
 	$(MAKE) -C demo clean-all
 	$(MAKE) -C dogfood clean-all
-	$(MAKE) -C stress clean-all
+	$(MAKE) -C mstress clean-all
 	$(MAKE) -C io_addr clean-all