jump: Change return type of predicate functions from int to bool

jump: Change return type of predicate functions from int to bool

gcc/ChangeLog:

	* rtl.h (comparison_dominates_p): Change return type from int to bool.
	(condjump_p): Ditto.
	(any_condjump_p): Ditto.
	(any_uncondjump_p): Ditto.
	(simplejump_p): Ditto.
	(returnjump_p): Ditto.
	(eh_returnjump_p): Ditto.
	(onlyjump_p): Ditto.
	(invert_jump_1): Ditto.
	(invert_jump): Ditto.
	(rtx_renumbered_equal_p): Ditto.
	(redirect_jump_1): Ditto.
	(redirect_jump): Ditto.
	(condjump_in_parallel_p): Ditto.
	* jump.cc (invert_exp_1): Adjust forward declaration.
	(comparison_dominates_p): Change return type from int to bool
	and adjust function body accordingly.
	(simplejump_p): Ditto.
	(condjump_p): Ditto.
	(condjump_in_parallel_p): Ditto.
	(any_uncondjump_p): Ditto.
	(any_condjump_p): Ditto.
	(returnjump_p): Ditto.
	(eh_returnjump_p): Ditto.
	(onlyjump_p): Ditto.
	(redirect_jump_1): Ditto.
	(redirect_jump): Ditto.
	(invert_exp_1): Ditto.
	(invert_jump_1): Ditto.
	(invert_jump): Ditto.
	(rtx_renumbered_equal_p): Ditto.