Fix link to travis
Fix link to travis

This lets one view the build log with a simple click

ryanra/lazy-static.rs,durka/lazy-static.rs,RustOS-Fork-Holding-Ground/lazy-static-spin,rust-lang-nursery/lazy-static.rs,SimonSapin/lazy-static.rs,tempbottle/lazy-static.rs,Kimundi/lazy-static.rs