nother sys/queue.h -> sys-queue.h fix

spotted by Tom Christensen
diff --git a/packet.h b/packet.h
index cb19456..b0a1531 100644
--- a/packet.h
+++ b/packet.h
@@ -35,7 +35,7 @@
 #endif /* WITH_OPENSSL */
 
 #include <sys/signal.h>
-#include <sys/queue.h>
+#include "openbsd-compat/sys-queue.h"
 
 struct kex;
 struct sshkey;