quick fix for scan modules not working in Armitage

[jlxsolutions]

this should fix any Pcap library issues
in MSF

root@bt:cd /pentest/exploits/framework3/external/pcaprub/
root@bt:/pentest/exploits/framework3/external/pcaprub# ruby extconf.rb && make
root@bt:/pentest/exploits/framework3/external/pcaprub# make install