修改迁移历史记录

yii migrate/mark 150101_185401                      # using timestamp to specify the migration
yii migrate/mark "2015-01-01 18:54:01"              # using a string that can be parsed by strtotime()
yii migrate/mark m150101_185401_create_news_table   # using full name
yii migrate/mark 1392853618                         # using UNIX timestamp