range-ops should return the requested boolean type.

range-ops should return the requested boolean type.

The pointer based relation operator's fold_range () routines should
return a boolean range with the requested type, not the default type.

	PR tree-optimization/115951
	* range-op-ptr.cc (operator_equal::fold_range): Return a boolean
	range with the requested type.
	(operator_not_equal::fold_range): Likewise.
	(operator_lt::fold_range): Likewise.
	(operator_le::fold_range): Likewise.
	(operator_gt::fold_range): Likewise.
	(operator_ge::fold_range): Likewise.