[Win] Support the x64 build
[Win] Support the x64 build

It allows REC to work with Crosswalk Windows 64bit build

Fix #222

crosswalk-project/realsense-extensions-crosswalk,halton/realsense-extensions-crosswalk,jondong/realsense-extensions-crosswalk,crosswalk-project/realsense-extensions-crosswalk,jondong/realsense-extensions-crosswalk,crosswalk-project/realsense-extensions-crosswalk,halton/realsense-extensions-crosswalk,jondong/realsense-extensions-crosswalk,halton/realsense-extensions-crosswalk,jondong/realsense-extensions-crosswalk,crosswalk-project/realsense-extensions-crosswalk,halton/realsense-extensions-crosswalk