From what i saw, the problem here is that the libpcap.so.0.8 doesn't exist in /usr/lib/ . But instead, libpcap.so.1 does.
This will do nothing at all but make things worse since this reaver relies on libpcap ran by older versions. I actually and tried to force install the reaver version added recently by adde88 https://github.com/adde88/openwrt-useful-tools, But that unfortunately didn't work for me too ( double checking later). I don't know how to edit reaver to read libpcap.so.1..im still learning and if you're still interested in this, make a different thread and ill gladly post any fix i find,