Update sthrift spec - only allow structs for req/res types
Update sthrift spec - only allow structs for req/res types

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