Ignore virtual box interfaces.
Ignore virtual box interfaces.

BUG=3918
R=juberti@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/33779004

git-svn-id: 917f5d3ca488f358c4d40eaec14422cf392ccec9@8012 4adac7df-926f-26a2-2b94-8c16560cd09d

TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc