Currently cooked_index entry creation is either:
- done immediately if the parent_entry is known, or
- deferred if the parent_entry is not yet known, and done later while
resolving the deferred entries.
Instead, create all cooked_index entries immediately, and keep track of which
entries have a parent_entry that needs resolving later using the new
IS_PARENT_DEFERRED flag.
Tested on x86_64-linux.
Approved-By: Tom Tromey <tom@tromey.com>
42bd6b5fd4