Add olivine-labs manifest server path to travis file
Add olivine-labs manifest server path to travis file

This way, when we update luassert / other dependencies, the travis
builds don't fail while the changes propagate. (Still pulls from the
official repo, it's just faster.)

ryanplusplus/busted,Olivine-Labs/busted,o-lim/busted,istr/busted,sobrinho/busted,mpeterv/busted,xyliuke/busted,DorianGray/busted