modify code at download_toolchain.sh, 2

download_toolchain.sh

@@ -37,7 +37,7 @@ fi
 
 # ----------------------------------------------------------------------------------------------------
 function SHELL_FUNCTION_HELP(){
-	echo "HELP"
+	echo "${SCRIPT_NAME}"
 	echo "  OPTIONS: [-h] [-help] 帮助信息"
 	echo "           [-l] [-list] 显示可以的下载列表"
 	echo "           [\${KEYWORD}] 下载包含KEYWORD关键字的toolchain,支持多个KEYWORD"