go/gcimporter15: read v3 export data not containing type aliases

This is a short-term stop-gap to keep the builders happy.

Change-Id: I87171c20bf44f36fd2c4d7213211217de6110fdd
Reviewed-on: https://go-review.googlesource.com/32293
Reviewed-by: Robert Griesemer <gri@golang.org>
1 file changed