dnsmasq: use host-record instead of address

Using "--address" for individual host A records is broken, use "--host-record" instead.
The following patch changes dnsmasq.init to build individual host records using "--host-record" instead of "--address".

Signed-off-by: Adam Gensler <openwrt at gnslr.us>
[jow: shorter description, simplified shell script code]

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36943 3c298f89-4303-0410-b956-a3cf2f4a3e73