Remember to set m_loaded_objc_opt once you've loaded the ObjC data

from the shared cache so you don't update it over & over.

<rdar://problem/20074768>

llvm-svn: 231514

lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp

@@ -1560,6 +1560,8 @@ AppleObjCRuntimeV2::UpdateISAToDescriptorMapIfNeeded()
             DescriptorMapUpdateResult shared_cache_update_result = UpdateISAToDescriptorMapSharedCache();
             if (!shared_cache_update_result.any_found)
                 WarnIfNoClassesCached ();
+            else
+                m_loaded_objc_opt = true;
         }
         
     }