Bump to dnsmasq2.74 & refresh patches to fix fuzz

Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46522 3c298f89-4303-0410-b956-a3cf2f4a3e73