TraceLoggingProvider: Disable for MinGW builds

There are no `TraceLoggerProvider.h` or `winmeta.h` headers
in MinGW w32api package, so just disable the support for
TraceLoggerProvider interfaces.

Signed-off-by: Pavel Solodovnikov <pavel.al.solodovnikov@gmail.com>

Author: ManManson

src/public/tier0/valve_tracelogging.h

@@ -82,7 +82,13 @@
 	#include <windows.h>
 	//#include <ShlObj.h>
 	//#include <winsock2.h>
-	#include <winmeta.h>
+
+	// TraceLoggingProvider-related header files are not available in MinGW builds, so disable it.
+	#if defined(_WIN32) && (defined(__MINGW32__) || defined(__MINGW64__))
+		#define VALVE_DISABLE_TRACELOGGING
+	#else
+		#include <winmeta.h>
+	#endif
 
 	#ifdef VALVE_DISABLE_TRACELOGGING
 		#define IsTraceLoggingEnabled() false

src/steamnetworkingsockets/clientlib/steamnetworkingsockets_lowlevel.cpp

@@ -78,6 +78,7 @@ namespace SteamNetworkingSocketsLib {
 
 inline void ETW_LongOp( const char *opName, SteamNetworkingMicroseconds usec, const char *pszInfo )
 {
+#if IsTraceLoggingEnabled()
 	if ( !pszInfo )
 		pszInfo = "";
 	TraceLoggingWrite(
@@ -87,6 +88,11 @@ inline void ETW_LongOp( const char *opName, SteamNetworkingMicroseconds usec, co
 		TraceLoggingUInt64( usec, "Microseconds" ),
 		TraceLoggingString( pszInfo, "ExtraInfo" )
 	);
+#else
+	(void)opName;
+	(void)usec;
+	(void)pszInfo;
+#endif
 }
 
 constexpr int k_msMaxPollWait = 1000;
@@ -4513,6 +4519,7 @@ STEAMNETWORKINGSOCKETS_INTERFACE void SteamNetworkingSockets_DefaultPreFormatDeb
 	// Gah, some, but not all, of our code has newlines on the end
 	V_StripTrailingWhitespaceASCII( buf );
 
+#if IsTraceLoggingEnabled()
 	// Emit an ETW event.  Unfortunately, TraceLoggingLevel requires a constant argument
 	if ( IsTraceLoggingProviderEnabled( HTraceLogging_SteamNetworkingSockets ) )
 	{
@@ -4553,6 +4560,7 @@ STEAMNETWORKINGSOCKETS_INTERFACE void SteamNetworkingSockets_DefaultPreFormatDeb
 			);
 		}
 	}
+#endif // IsTraceLoggingEnabled()
 
 	// Spew to log file?
 	#ifdef STEAMNETWORKINGSOCKETS_ENABLE_SYSTEMSPEW