name all audio threads (that I know how to) for debugging, as suggested in response to revision d00b719966.

Source/Core/AudioCommon/Src/AOSoundStream.cpp

@@ -25,6 +25,8 @@
 
 void AOSound::SoundLoop()
 {
+	Common::SetCurrentThreadName("Audio thread - ao");
+
 	uint_32 numBytesToRender = 256;
 	ao_initialize();
 	default_driver = ao_default_driver_id();

Source/Core/AudioCommon/Src/AlsaSoundStream.cpp

@@ -60,6 +60,7 @@ void AlsaSound::SoundLoop()
 		thread_data = 2;
 		return;
 	}
+	Common::SetCurrentThreadName("Audio thread - alsa");
 	while (!thread_data)
 	{
 		m_mixer->Mix(reinterpret_cast<short *>(mix_buffer), frames_to_deliver);

Source/Core/AudioCommon/Src/DSoundStream.cpp

@@ -96,7 +96,7 @@ bool DSound::WriteDataToBuffer(DWORD dwOffset,                  // Our own write
 // The audio thread.
 void DSound::SoundLoop()
 {
-	Common::SetCurrentThreadName("Audio thread");
+	Common::SetCurrentThreadName("Audio thread - dsound");
 
 	currentPos = 0;
 	lastPos = 0;
@@ -132,7 +132,7 @@ bool DSound::Start()
 
 	DWORD num1;
 	short* p1;
-	dsBuffer->Lock(0, bufferSize, (void* *)&p1, &num1, 0, 0, 0);
+	dsBuffer->Lock(0, bufferSize, (void* *)&p1, &num1, 0, 0, DSBLOCK_ENTIREBUFFER);
 	memset(p1, 0, num1);
 	dsBuffer->Unlock(p1, num1, 0, 0);
 	thread = std::thread(std::mem_fun(&DSound::SoundLoop), this);

Source/Core/AudioCommon/Src/OpenALStream.cpp

@@ -121,6 +121,8 @@ void OpenALStream::Clear(bool mute)
 
 void OpenALStream::SoundLoop()
 {
+	Common::SetCurrentThreadName("Audio thread - openal");
+
 	ALenum err;
 	u32 ulFrequency = m_mixer->GetSampleRate();
 

Source/Core/AudioCommon/Src/PulseAudioStream.cpp

@@ -58,6 +58,8 @@ void PulseAudio::Update()
 // Called on audio thread.
 void PulseAudio::SoundLoop()
 {
+	Common::SetCurrentThreadName("Audio thread - pulse");
+
 	thread_running = PulseInit();
 
 	while (thread_running)