Use _WIN32 rather than HAVE_WINSOCK.

Change-Id: I9855b6fe72e2f2f3a8360c0993a67cb988024ee4
diff --git a/include/utils/ByteOrder.h b/include/utils/ByteOrder.h
index baa3a83..44ea13d 100644
--- a/include/utils/ByteOrder.h
+++ b/include/utils/ByteOrder.h
@@ -21,7 +21,7 @@
 
 #include <stdint.h>
 #include <sys/types.h>
-#ifdef HAVE_WINSOCK
+#if defined(_WIN32)
 #include <winsock2.h>
 #else
 #include <netinet/in.h>