evas/edje/elm: Override debug_name in core classes

evas/edje/elm: Override debug_name in core classes

This is really only a demonstration of what kind of information
we can print with efl_debug_name_get(). Hopefully this can help
debugging with printf/ERR logs and even help with live debugging
inside gdb.

This shouldn't be used for other purposes than debugging, as the
exact string format is not defined.

@feature