Fix missing method.

Author: jlaanstra

test/nuget/TestRuntimeComponentEmpty/module.cpp

@@ -13,6 +13,7 @@ bool __stdcall winrt_can_unload_now() noexcept
 }
 
 void* __stdcall TestStaticLibrary5_get_activation_factory(std::wstring_view const& name);
+void* __stdcall TestStaticLibrary6_get_activation_factory(std::wstring_view const& name);
 
 void* __stdcall winrt_get_activation_factory(std::wstring_view const& name)
 {
@@ -21,6 +22,11 @@ void* __stdcall winrt_get_activation_factory(std::wstring_view const& name)
     {
         return factory;
     }
+    factory = TestStaticLibrary6_get_activation_factory(name);
+    if (factory)
+    {
+        return factory;
+    }
 
     return nullptr;
 }