ART: Add class-alloc-inl.h

In an effort to reduce the (transitive) proliferation of heap-inl
add a specific inline header for class instance allocation.

Bug: 118385392
Test: mmma art
Test: m test-art-host
Change-Id: I32529f0221a836452c58687330a91ac0d5fde162
diff --git a/runtime/gc/reference_queue_test.cc b/runtime/gc/reference_queue_test.cc
index ce0807c..c680fb5 100644
--- a/runtime/gc/reference_queue_test.cc
+++ b/runtime/gc/reference_queue_test.cc
@@ -18,6 +18,7 @@
 
 #include "common_runtime_test.h"
 #include "handle_scope-inl.h"
+#include "mirror/class-alloc-inl.h"
 #include "mirror/class-inl.h"
 #include "reference_queue.h"
 #include "scoped_thread_state_change-inl.h"