Avoid gcc shadow warning

Author: ksperling-apple

src/system/tests/TestEventLoopHandler.cpp

@@ -50,12 +50,12 @@ class TestEventLoopHandler : public ::testing::Test
     template <class Lambda>
     static std::function<void()> Schedule(Timeout delay, Lambda lambda)
     {
-        auto * function                        = new std::function<void()>(lambda);
         System::TimerCompleteCallback callback = [](System::Layer * layer, void * ctx) {
             auto * function = static_cast<std::function<void()> *>(ctx);
             (*function)();
             delete function;
         };
+        auto * function = new std::function<void()>(lambda);
         SystemLayer().StartTimer(delay, callback, function);
         return [=] { SystemLayer().CancelTimer(callback, function); };
     }