Add VerifyObject to StackHandleScope::SetReference

Helps catch GC bugs. Also moved some of the HandleScope logic to the
inl file.

Bug: 13054004
Change-Id: I81b9dd717092b6a467fcd28b4df0089ec075dd44
diff --git a/runtime/mirror/array-inl.h b/runtime/mirror/array-inl.h
index 13f881d..4dddd38 100644
--- a/runtime/mirror/array-inl.h
+++ b/runtime/mirror/array-inl.h
@@ -19,6 +19,7 @@
 
 #include "array.h"
 
+#include "base/stringprintf.h"
 #include "class.h"
 #include "gc/heap-inl.h"
 #include "thread.h"