[Tests] building C extensions on iojs 3 and greater doesn’t work on a stock sudoless travis-ci VM.
[Tests] building C extensions on iojs 3 and greater doesn’t work on a stock sudoless travis-ci VM.

Reverts #244.
Joris-van-der-Wel/tape,substack/tape,Joris-van-der-Wel/tape,mstade/tape,ljharb/tape,mstade/tape,feross/tape,Joris-van-der-Wel/tape,jtlapp/tape,substack/tape,jtlapp/tape,ljharb/tape,ljharb/tape,jtlapp/tape,mstade/tape,substack/tape,feross/tape,feross/tape