More work on the lua console

Common/Thread/ThreadUtil.cpp

@@ -31,7 +31,10 @@ void AttachThreadToJNI() {
 	if (g_attach) {
 		g_attach();
 	} else {
+#if PPSSPP_PLATFORM(ANDROID)
+		// Not relevant on other platforms.
 		ERROR_LOG(Log::System, "Couldn't attach thread - g_attach not set");
+#endif
 	}
 }