name some threads

Source/Core/DolphinQt/DiscordHandler.cpp

@@ -69,6 +69,8 @@ void DiscordHandler::ShowNewJoinRequest(const std::string& id, const std::string
 
 void DiscordHandler::Run()
 {
+  Common::SetCurrentThreadName("DiscordHandler");
+
   while (!m_stop_requested.IsSet())
   {
     Discord::CallPendingCallbacks();

Source/Core/DolphinQt/HotkeyScheduler.cpp

@@ -134,6 +134,8 @@ static void HandleFrameStepHotkeys()
 
 void HotkeyScheduler::Run()
 {
+  Common::SetCurrentThreadName("HotkeyScheduler");
+
   while (!m_stop_requested.IsSet())
   {
     Common::SleepCurrentThread(1000 / 60);