ObjPtr<>-ify mirror::IfTable.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 31113334
Change-Id: I77d36cc96f48ff92c1ca3b2581be7637a2ea22d7
diff --git a/runtime/mirror/class-inl.h b/runtime/mirror/class-inl.h
index 57e8e8d..fe67a5b 100644
--- a/runtime/mirror/class-inl.h
+++ b/runtime/mirror/class-inl.h
@@ -31,7 +31,7 @@
 #include "dex/dex_file-inl.h"
 #include "dex/invoke_type.h"
 #include "dex_cache.h"
-#include "iftable.h"
+#include "iftable-inl.h"
 #include "imtable.h"
 #include "object-inl.h"
 #include "object_array.h"