swift

ee751835 - Package CMO: Skip deserialization error checks for same-module decls.

Package CMO: Skip deserialization error checks for same-module decls. IterableDeclContext::checkDeserializeMemberErrorInPackage recursively checks if decls and their member decls are deserialized correctly into another module. This PR adds a check to make sure the inspected decls are from another module, and provides an opt-in flag to fail fast on deserialization failure if found. rdar://143830240