ART: Clean up includes.

Reduce dependencies to improve incremental build times.
Break up circular dependency involving class_linker-inl.h.

Change-Id: I4be742c5c2b5cd9855beea86630fd68aab76b0db
diff --git a/runtime/oat_file_assistant_test.cc b/runtime/oat_file_assistant_test.cc
index 37c6353..0c942d2 100644
--- a/runtime/oat_file_assistant_test.cc
+++ b/runtime/oat_file_assistant_test.cc
@@ -26,7 +26,7 @@
 #include <gtest/gtest.h>
 
 #include "art_field-inl.h"
-#include "class_linker.h"
+#include "class_linker-inl.h"
 #include "common_runtime_test.h"
 #include "compiler_callbacks.h"
 #include "mem_map.h"