ART: Fix missing dependency between GVN and other passes

The GVN may be turned off completely, or skip running when the
method is too complex. Turn off DCE in that case.

The dependent cleanup pass is not an optimization pass, so can't be
turned off that way. Check whether the GVN skipped in the gate function.

A possible follow-up is proper dependencies between passes.

Change-Id: I5b7951ecd6c74ebbfa5b23726a3d2f3ea1a23a47