Adding a bunch of profiling tracers.

src/xenia/apu/xaudio2/xaudio2_audio_driver.cc

@@ -121,6 +121,8 @@ void XAudio2AudioDriver::Initialize() {
 }
 
 void XAudio2AudioDriver::SubmitFrame(uint32_t frame_ptr) {
+  SCOPE_profile_cpu_f("apu");
+
   // Process samples! They are big-endian floats.
   HRESULT hr;