generate upgrade sql for 3.7.0

sql/upgrade/n9e_rdb-v3.7.0.sql

+set names utf8;
+use n9e_rdb;
+
+CREATE TABLE `stats`
+(
+    `name`   varchar(64)  not null,
+    `value`  bigint       not null default 0,
+    PRIMARY KEY (`name`)
+) ENGINE = InnoDB DEFAULT CHARSET = utf8;