Some helpers for GHC Core and HERMIT. To do: offer to HERMIT folks for inclusion.

Requires GHC 7.8.2 or later.

Assumes some old versions of KU software:

• KURE, commit 7ce26aa
• HERMIT, commit 5557609

To use these versions, clone the repos (or pull if already cloned), and use "git checkout [commit-id]".