docs(mysqlSQLSplinter): 添加SQL导入注释说明

添加了关于如何导入分割后SQL文件的注释，方便后续操作参考

shell/mysqlSQLSplinter.sh

@@ -49,3 +49,7 @@ EOF
 
 echo "split ${tableName}-${inputdt}.sql to ${tableName}-${inputdt}-out.sql"
 
+# 导入
+#mysql -u root -p ppospro_device < ./${tableName}-${inputdt}-out.sql 
+
+#echo "import ${tableName}-${inputdt}-out.sql to ppospro_device"