[HCL] Digitus DN-170014 supported by richcomm_usb

Reference: http://lists.alioth.debian.org/pipermail/nut-upsdev/2014-March/006695.html -or-
http://news.gmane.org/find-root.php?message_id=CADq9dvWMx0xBz9XXkVKXCre4ox%2d2kSeHtD7LW39eEDH1RCY8sQ%40mail.gmail.com
Link libupsclient with libcommon

Fix undefined references related to functions of libcommon. This issue
was reported on Debian: https://bugs.debian.org/731156
(patch from Matthias Klose ; Closes Github issue #73)
[HCL] CABAC UPS-1700DV2 supported by blazer_usb

Reported by jammin84

Closes #113