omp-low.c (expand_omp_target): Use auto_vec<tree, 11> instead of vec<tree> * with vec_alloc and release for args.

	* omp-low.c (expand_omp_target): Use auto_vec<tree, 11>
	instead of vec<tree> * with vec_alloc and release for args.
	Adjust all users.

From-SVN: r221460