OnDiskCache: avoid storing local def id hashes in foreign def id collection
OnDiskCache: avoid storing local def id hashes in foreign def id collection

graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust