i#1962 Travis CI: add verbose output
i#1962 Travis CI: add verbose output

Adds -VV and prints the ctest output, to diagnose failures (we have no
access to the actual logs).

Review-URL: https://codereview.appspot.com/297670043

AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio