might as well add openbsd while we're at it
might as well add openbsd while we're at it

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