UNOIDL identifiers starting with a lowercase letter and containing hyphens are
reserved for the implementation.  It would be good to be able to enforce that in
code parsing UNOIDL files, but some existing identifiers violate that.

In the case of the published, deprecated css.uno.Uik, the change is incompatible
in theory but arguably irrelevant in practice.

Change-Id: I61f66e2d73c6aca5498ae566758893b546eb81d5