Add make directive to run with sata drive

src/makefile

@@ -9,3 +9,8 @@ all:
 
 clean:
 	rm *.o *.bin
+run:
+	qemu-system-i386 -kernel myos.bin -serial file:serial.log -hda /dev/null \
+	-drive file=/dev/null,if=none,id=drive-sata0-0-0 \
+	-device ich9-ahci,id=ahci \
+	-device ide-drive,drive=drive-sata0-0-0,bus=ahci.0 \