Return the status code from rsync

D'oh!
Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>

lib/publish.sh

@@ -34,5 +34,5 @@ kick_publisher_tires() {
 	# than pull. For now: nothing to see here; move along.
 	rsync -a ${HBSD_PUBDIR}/${HBSD_BUILDNUMBER}/ \
 	    ${HBSD_MIRROR_MASTER}:${HBSD_MIRROR_PUBDIR}/build-${HBSD_BUILDNUMBER}
-	return 0
+	return ${?}
 }