Update README
Update README

libpcap-dev was listed twice, and we also need a toolchain, make, and rsync.

haka-security/haka,lcheylus/haka,LubyRuffy/haka,Wingless-Archangel/haka,haka-security/haka,haka-security/haka,nabilbendafi/haka,lcheylus/haka,Wingless-Archangel/haka,LubyRuffy/haka,lcheylus/haka,nabilbendafi/haka,nabilbendafi/haka