Pre-allocate the NoClassDefFoundError to be thrown for boot classes.

Bring over a Dalvik "optimization".
Bug: 12804658
Bug: 16853450
Change-Id: I6419de7bd2ba18d91479cb52489104954f5c4524
diff --git a/runtime/class_linker.h b/runtime/class_linker.h
index bb6b1c8..064a85d 100644
--- a/runtime/class_linker.h
+++ b/runtime/class_linker.h
@@ -85,7 +85,7 @@
   mirror::Class* FindArrayClass(Thread* self, mirror::Class** element_class)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  // Reutrns true if the class linker is initialized.
+  // Returns true if the class linker is initialized.
   bool IsInitialized() const;
 
   // Define a new a class based on a ClassDef from a DexFile