* decl.c (grokdeclarator): Complain about reference, pointer, or
typedef to VLA.
(create_array_type_for_decl): Complain about array of VLA.
* pt.c (tsubst): Likewise.
* rtti.c (get_tinfo_decl): Talk about "array of runtime bound".
* semantics.c (finish_decltype_type): Complain about decltype of VLA.
* typeck.c (cp_build_addr_expr_1): Complain about VLA.
(cxx_sizeof_or_alignof_type): Likewise.