resolve path to c++ addons built by node-gyp - Node.js module

 Throughout the course of Node.js's native addon history, addons have ended up
 being compiled in a variety of different places, depending on which build tool
 and which version of Node.js was used. In addition, the gyp build tool can
 produce either a Release or Debug build, each being built into different
 locations.
 .
 This module checks all the possible locations that a native addon would be
 built at, and returns the first one that loads successfully.
 .
 In Debian, addons are always built in the same place - in the Release
 directory. This module allows upstream code to remain unchanged regardless of
 the environment it is built in.
 .
 Node.js is an event-based server-side JavaScript engine.