lldpd: add STOP=01 param in init script

This should ensure that lldpd is among the first processes to stop,
so that it has time to send the shutdown LLDPU to the other side,
before the network goes down.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47786 3c298f89-4303-0410-b956-a3cf2f4a3e73