Fix object verification.

Refactor VERIFY_OBJECT_ENABLED to become less brittle to change enum and global
constant.

Change-Id: Ie405106be81dce9a913730c7f46a5659582fa18b
diff --git a/src/oat/runtime/arm/context_arm.cc b/src/oat/runtime/arm/context_arm.cc
index 4612986..814e649 100644
--- a/src/oat/runtime/arm/context_arm.cc
+++ b/src/oat/runtime/arm/context_arm.cc
@@ -17,6 +17,7 @@
 #include "context_arm.h"
 
 #include "mirror/abstract_method.h"
+#include "mirror/object-inl.h"
 #include "stack.h"
 #include "thread.h"