Properly specify path to Boost headers
Properly specify path to Boost headers

In file included from src/usb_stats.cpp:31:
include/usbtop/usb_stats.h:37:10: fatal error: 'boost/circular_buffer.hpp' file not found
#include <boost/circular_buffer.hpp>
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~

aguinet/usbtop,aguinet/usbtop