8000213: NPG: Should have renamed arrayKlass and typeArrayKlass

Capitalize these metadata types (and objArrayKlass)

Reviewed-by: stefank, twisti, kvn

hotspot/src/share/vm/memory/specialized_oop_closures.hpp

@@ -200,7 +200,7 @@ public:
   enum Kind {
     ik,             // InstanceKlass
     irk,            // InstanceRefKlass
-    oa,             // objArrayKlass
+    oa,             // ObjArrayKlass
     NUM_Kinds
   };