Add FPS to SDL title bar

Also fix a small issue with incorrect shutdown ordering in SDL.
Previously the system would still be running so the telemetry task
didn't launch and detached_tasks would assert(count == 0)

src/citra/citra.cpp

@@ -346,8 +346,6 @@ int main(int argc, char** argv) {
 
     Core::System& system{Core::System::GetInstance()};
 
-    SCOPE_EXIT({ system.Shutdown(); });
-
     const Core::System::ResultStatus load_result{system.Load(*emu_window, filepath)};
 
     switch (load_result) {
@@ -418,6 +416,8 @@ int main(int argc, char** argv) {
         system.VideoDumper().StopDumping();
     }
 
+    system.Shutdown();
+
     detached_tasks.WaitForAllTasks();
     return 0;
 }