mdnsresponder: bump to 544 (thanks Markus Stenberg)

git-svn-id: svn://svn.openwrt.org/openwrt/packages@39603 3c298f89-4303-0410-b956-a3cf2f4a3e73
mdnsresponder: fix loss of unicast packets (thx Markus Stenberg)

git-svn-id: svn://svn.openwrt.org/openwrt/packages@39645 3c298f89-4303-0410-b956-a3cf2f4a3e73
Merge branch 'master' of git://git.openwrt.org/packages