Remove fake support for global group range settings

Remove fake support for global group range settings

A symbols file may contain a global, non key specific setting for
the group out-of-range handling method (wrap, clamp, redirect). Only
that:

* Its parsed and kept in the SymbolsInfo, but is not otherwise used in
  any way (it's the same in the real xkbcomp).
* It's not used in any of xkeyboard-config files.
* It's not mentioned in the xkb specs (only the per-key ones).
* It doesn't make much sense anyway.

So remove the struct field, and emit an "unsupported, ignored" warning.
We don't increment the error count because of it, just continue (the
radio group warning just below is changed to do the same - there's no
reason to possibly abort the entire thing for it).

Signed-off-by: Ran Benita <ran234@gmail.com>
Conflicts:

	src/xkbcomp/symbols.c