Remove two infrun cleanups

Remove two infrun cleanups

This removes a couple of cleanups from infrun by introducing a couple
of unique_ptr specializations.

gdb/ChangeLog
2018-09-17  Tom Tromey  <tom@tromey.com>

	* inferior.h (struct infcall_suspend_state_deleter): New.
	(infcall_suspend_state_up): New typedef.
	(struct infcall_control_state_deleter): New.
	(infcall_control_state_up): New typedef.
	(make_cleanup_restore_infcall_suspend_state)
	(make_cleanup_restore_infcall_control_state): Don't declare.
	* infcall.c (call_function_by_hand_dummy): Update.
	* infrun.c (do_restore_infcall_suspend_state_cleanup)
	(make_cleanup_restore_infcall_suspend_state): Remove.
	(do_restore_infcall_control_state_cleanup)
	(make_cleanup_restore_infcall_control_state): Remove.