fix(generator): fix site is not defined error (#3360)
fix(generator): fix site is not defined error (#3360)

* Locals.prototype.site is deleted in (#3359)
DevinLow/DevinLow.github.io,hexojs/hexo,kywk/hexi,DevinLow/DevinLow.github.io,hexojs/hexo,kywk/hexi,ppker/hexo,ppker/hexo