[optimizing] Ensure FillNewArray sets array access

A method that only used filled new like 'int[]{0,0}' didn't have the
array access flag set, so BCE didn't remove the checks.

Change-Id: Iedec50daf0d25b1cc3872eb1a4cfc7b8bb31e6bf
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>
diff --git a/compiler/optimizing/builder.cc b/compiler/optimizing/builder.cc
index 818d671..e189993 100644
--- a/compiler/optimizing/builder.cc
+++ b/compiler/optimizing/builder.cc
@@ -984,6 +984,7 @@
     default:
       LOG(FATAL) << "Unknown element width for " << payload->element_width;
   }
+  graph_->SetHasArrayAccesses(true);
 }
 
 void HGraphBuilder::BuildFillWideArrayData(HInstruction* object,