phonemeextractor: Backport phonemeextractor DLLs from TF2

Author: dimhotepus

utils/phonemeextractor/extractor_utils.cpp

@@ -0,0 +1,21 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+#include "winlite.h"
+#include "tier1/strtools.h"
+#include <stdio.h>
+
+char *va( const char *fmt, ... )
+{
+	va_list args;
+	static char output[4][1024];
+	static int outbuffer = 0;
+
+	outbuffer++;
+	va_start( args, fmt );
+	vprintf( fmt, args );
+	V_vsprintf_safe( output[ outbuffer & 3 ], fmt, args );
+	return output[ outbuffer & 3 ];
+}