Fix aoe-discover symlink in /etc/network/if-up.d/ Closes: #834225, LP: 1650682

debian/aoetools.links

@@ -1,2 +1,2 @@
-usr/sbin/aoe-discover   etc/network/if-up.d/aoe-discover
-dev/null                lib/systemd/system/aoetools.service
+sbin/aoe-discover   etc/network/if-up.d/aoe-discover
+dev/null            lib/systemd/system/aoetools.service