lib/statsd: fix typo
lib/statsd: fix typo

chenwenbin928/tchannel,Zirpon/tchannel,RyanTech/tchannel,Zirpon/tchannel,i/tchannel,RyanTech/tchannel,i/tchannel,sasa233/tchannel,hustxiaoc/tchannel,vanloswang/tchannel,chenwenbin928/tchannel,RyanTech/tchannel,savaki/tchannel,benfleis/tchannel,bunnyblue/tchannel,hustxiaoc/tchannel,hustxiaoc/tchannel,i/tchannel,benfleis/tchannel,vanloswang/tchannel,bunnyblue/tchannel,Zirpon/tchannel,savaki/tchannel,savaki/tchannel,sasa233/tchannel,chenwenbin928/tchannel,sasa233/tchannel,benfleis/tchannel,vanloswang/tchannel,bunnyblue/tchannel