Fix building with PCH disabled.

Source/Core/AudioCommon/AudioCommon.cpp

@@ -14,6 +14,7 @@
 #include "AudioCommon/PulseAudioStream.h"
 #include "AudioCommon/XAudio2_7Stream.h"
 #include "AudioCommon/XAudio2Stream.h"
+#include "Common/Common.h"
 #include "Common/FileUtil.h"
 #include "Common/MsgHandler.h"
 #include "Common/Logging/Log.h"

Source/Core/AudioCommon/Mixer.cpp

@@ -2,6 +2,8 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include <cstring>
+
 #include "AudioCommon/AudioCommon.h"
 #include "AudioCommon/Mixer.h"
 #include "Common/CPUDetect.h"

Source/Core/AudioCommon/Mixer.h

@@ -5,8 +5,8 @@
 #pragma once
 
 #include <atomic>
+#include <cstring>
 #include <mutex>
-#include <string>
 
 #include "AudioCommon/WaveFile.h"
 

Source/Core/AudioCommon/NullSoundStream.cpp

@@ -2,6 +2,8 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include <cstring>
+
 #include "AudioCommon/NullSoundStream.h"
 #include "Core/HW/AudioInterface.h"
 #include "Core/HW/SystemTimers.h"

Source/Core/AudioCommon/OpenALStream.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include <cstring>
 #include <thread>
 
 #include "AudioCommon/aldlist.h"

Source/Core/AudioCommon/PulseAudioStream.cpp

@@ -2,6 +2,8 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include <cstring>
+
 #include "AudioCommon/DPL2Decoder.h"
 #include "AudioCommon/PulseAudioStream.h"
 #include "Common/CommonTypes.h"

Source/Core/AudioCommon/aldlist.cpp

@@ -26,6 +26,8 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <cstring>
+
 #include "AudioCommon/aldlist.h"
 #include "Common/CommonFuncs.h"
 #include "Common/CommonTypes.h"