Revise the way how the octeon bootloader is built. The original

approach was not right, and there is still room for improvement.
OK deraadt@

src/etc/etc.octeon/Makefile.inc

@@ -1,8 +1,8 @@
-#	$OpenBSD: Makefile.inc,v 1.5 2019/07/28 15:45:30 visa Exp $
+#	$OpenBSD: Makefile.inc,v 1.6 2019/08/04 08:53:14 visa Exp $
 
 KERNELS += GENERIC.MP bsd.mp
 
 bootblocks:
-	# None yet.
+	cp -p ${DESTDIR}/usr/mdec/boot ${RELEASEDIR}
 
 MDEXT=	boot bsd.rd miniroot${OSrev}.fs