* global.c (earlyclobber_regclass): Change the type to
	VEC(int,heap).
	(check_earlyclobber): Update uses of earlyclobber_regclass.
	(mark_reg_use_for_earlyclobber): Likewise.
	(calculate_local_reg_bb_info): Allocate and free
	earlyclobber_regclass using the VEC API.

From-SVN: r98922