Virtualenv3 moves random.py into the virtualenv, so we can't use it as the control any more.  Just examine all the modules we import, and use all their locations as the pylib directories.
Virtualenv3 moves random.py into the virtualenv, so we can't use it as the control any more.  Just examine all the modules we import, and use all their locations as the pylib directories.

nedbat/coveragepy,larsbutler/coveragepy,nedbat/coveragepy,larsbutler/coveragepy,7WebPages/coveragepy,nedbat/coveragepy,larsbutler/coveragepy,blueyed/coveragepy,jayhetee/coveragepy,jayhetee/coveragepy,blueyed/coveragepy,jayhetee/coveragepy,nedbat/coveragepy,blueyed/coveragepy,nedbat/coveragepy,blueyed/coveragepy,hugovk/coveragepy,hugovk/coveragepy,jayhetee/coveragepy,7WebPages/coveragepy,blueyed/coveragepy,jayhetee/coveragepy,hugovk/coveragepy,hugovk/coveragepy,larsbutler/coveragepy,larsbutler/coveragepy,hugovk/coveragepy,7WebPages/coveragepy,7WebPages/coveragepy