go/types: adopt spec terminology, use 'embedded' rather then 'anonyous' field
Commit
f8b4123613a (https://go-review.googlesource.com/35108) adjusted
the spec to uniformly use 'embedded' rather than 'anonymous' for struct
embedded fields. Adjust go/types' internal terminology.
Provide an additional accessor Var.IsEmbedded().
This is essentially a rename of an internal field and adjustments of
documentation.
Change-Id: Icd07aa192bc5df7a2ee103185fa7e9c55e8f1ac3
Reviewed-on: https://go-review.googlesource.com/112716
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>