Build openssl and curl first.
Build openssl and curl first.

This lets us use https resources requiring SNI for subsequent
components.

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