Convert CFN_BUILT_IN_PARITY to range-ops.

Convert CFN_BUILT_IN_PARITY to range-ops.

Also, as the last builtin remaining, also remove the builtin infrastrucure
routines from fold_using_range.

	* gimple-range-fold.cc (range_of_range_op): Handle no operands.
	(range_of_call): Do not check for builtins.
	(fold_using_range::range_of_builtin_call): Delete.
	(fold_using_range::range_of_builtin_int_call): Delete.
	* gimple-range-fold.h: Adjust prototypes.
	* gimple-range-op.cc (class cfn_parity): New.
	(gimple_range_op_handler::maybe_builtin_call): Set arguments.