/usr/include/connectivity-cpp-0/ is in libconnectivity-cpp-dev 0.0.1+14.04.20140312-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/connectivity-cpp-0/com/
/usr/include/connectivity-cpp-0/com/ubuntu/
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/link.h
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/manager.h
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/service/
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/service.h
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/service/tethering/
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/service/tethering/service.h
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/service/tor/
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/service/tor/service.h
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/service/vpn/
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/service/vpn/service.h
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/wifi/
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/wifi/access-point.h
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/wifi/link.h
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/wwan/
/usr/include/connectivity-cpp-0/com/ubuntu/connectivity/networking/wwan/link.h