Fix bug where refs may not get set for Records (#1645) (#1646)

This requires a combination of things, but it happens to be a
combination used by Diplomacy in Rocket Chip. It must be a Record in
compatibility code with Vecs as fields and a mix of components with and
without set directions.

(cherry picked from commit 0979133b

)

Co-authored-by: Jack Koenig <koenig@sifive.com>