[Feature][S300AI][task-view-1715][wifi] add S300AI compile cmd

Change-Id: If10f18c326662d3ff6be3664a98f77d303d87c1f
diff --git a/Makefile b/Makefile
index 4ef183b..0733ca6 100755
--- a/Makefile
+++ b/Makefile
@@ -83,7 +83,7 @@
 	@echo example S300_AIC : make AP_PRJ=prj_mifi_min BOOT_PRJ=mifi_mini_64 PACK_PRJ=prj_mifi PATH_PRJ=lynq/S300_AIC
 	@echo example R306_MTN : make AP_PRJ=prj_cpe BOOT_PRJ=cpe PACK_PRJ=prj_cpe PATH_PRJ=lynq/R306_MTN
 	@echo example R306BR : make AP_PRJ=prj_cpe BOOT_PRJ=cpe PACK_PRJ=prj_cpe PATH_PRJ=lynq/R306BR
-	@echo example S300AI : make AP_PRJ=prj_cpe BOOT_PRJ=cpe PACK_PRJ=prj_cpe PATH_PRJ=lynq/S300AI
+	@echo example S300AI : make AP_PRJ=prj_cpe BOOT_PRJ=cpe PACK_PRJ=prj_cpe PATH_PRJ=lynq/S300AI key=lynq_key
 	@echo The default value of AP_PRJ is prj_cpe_min. The following values are optional :
 	@ls ap/project/zx297520v3/*/ -d | xargs -I {} basename "{}" | tr '\n' '   '
 	@echo