Lower build_wait_timeout to 1 hour so slaves can shut down
Lower build_wait_timeout to 1 hour so slaves can shut down

rust-lang-deprecated/rust-buildbot,aidanhs/rust-buildbot,aidanhs/rust-buildbot,edunham/rust-buildbot,edunham/rust-buildbot,rust-lang/rust-buildbot,edunham/rust-buildbot,aidanhs/rust-buildbot,rust-lang/rust-buildbot,rust-lang-deprecated/rust-buildbot,rust-lang/rust-buildbot,rust-lang-deprecated/rust-buildbot