Change use to type-based pool allocator in ira-build.c.

	* ira-build.c (initiate_allocnos): Use new type-based pool allocator.
	(ira_create_object): Likewise.
	(ira_create_allocno): Likewise.
	(ira_create_live_range): Likewise.
	(copy_live_range): Likewise.
	(ira_finish_live_range): Likewise.
	(ira_free_allocno_costs): Likewise.
	(finish_allocno): Likewise.
	(finish_allocnos): Likewise.
	(initiate_prefs): Likewise.
	(ira_create_pref): Likewise.
	(finish_pref): Likewise.
	(finish_prefs): Likewise.
	(initiate_copies): Likewise.
	(ira_create_copy): Likewise.
	(finish_copy): Likewise.
	(finish_copies): Likewise.
	(finish_prefs): Likewise.

From-SVN: r223972