Added formulas for ntopng and ndpi

Dear all, please find enclosed the formulas for two open source tools ntop develops:
- nDPI: SDK for deep-packet inspection
- ntopng: web-based traffic monitoring application.

Thanks Luca Deri
Ok i will change it but in a previous comment I have been told to look at cmake.rb as example and they do

    system "./bootstrap", *args
    system "make"
    system "make install"
  end