Add more info to GetSFields DCHECK

Some hprof test 64 bit failures had this DCHECK failing.

Change-Id: Iede7432056f99aa2773ddfd098b359fca5f4371e
diff --git a/runtime/mirror/class-inl.h b/runtime/mirror/class-inl.h
index 495f753..97052f1 100644
--- a/runtime/mirror/class-inl.h
+++ b/runtime/mirror/class-inl.h
@@ -439,7 +439,7 @@
 }
 
 inline ObjectArray<ArtField>* Class::GetSFields() {
-  DCHECK(IsLoaded() || IsErroneous());
+  DCHECK(IsLoaded() || IsErroneous()) << GetStatus();
   return GetFieldObject<ObjectArray<ArtField>>(OFFSET_OF_OBJECT_MEMBER(Class, sfields_));
 }