CORBA35 — update the spec to not used anonymous types

The spec describes that anonymous types are deprecated and will be removed in the future (as below), but this is used throughout the spec. Before deprecating this fully, update the spec to not used anonymous types: >From 3.11.6 IDL currently permits the use of anonymous types in a number of places. For example: struct Foo

Anonymous types cause a number of problems for language mappings and are therefore deprecated by this specification. Anonymous types will be removed in a future version, so new IDL should avoid use of anonymous types and use a typedef to name such types instead. Compilers need not issue a warning if a deprecated construct is encountered.