Add class table field to class loader

Fixes bug with the class table where the comparator would cause read
barriers and break the map strict ordering properties.

Bug: 22957957

Change-Id: I8dbc042db6e22e2172ab4ec58ddf1db0345dcaaa
diff --git a/runtime/class_linker_test.cc b/runtime/class_linker_test.cc
index 4212dda..3c84d8f 100644
--- a/runtime/class_linker_test.cc
+++ b/runtime/class_linker_test.cc
@@ -546,6 +546,7 @@
 
 struct ClassLoaderOffsets : public CheckOffsets<mirror::ClassLoader> {
   ClassLoaderOffsets() : CheckOffsets<mirror::ClassLoader>(false, "Ljava/lang/ClassLoader;") {
+    addOffset(OFFSETOF_MEMBER(mirror::ClassLoader, class_table_), "classTable");
     addOffset(OFFSETOF_MEMBER(mirror::ClassLoader, packages_), "packages");
     addOffset(OFFSETOF_MEMBER(mirror::ClassLoader, parent_), "parent");
     addOffset(OFFSETOF_MEMBER(mirror::ClassLoader, proxyCache_), "proxyCache");