修复x-input 右边clear无法正确清除

[xiaozhanghui]

Please makes sure the items are checked before submitting your PR, thank you!

• [ ] Rebase before creating a PR to keep commit history clear.
• [ ] Only One commit
• [ ] No eslint errors

[caozhong1996]

你使用的vux版本号是多少，我记得不久前修复过这个问题 #3771

[xiaozhanghui]

最近我升级cli3莫名好了，之前应该也是2.10.1，暂时关闭这个。谢谢了。