Use travis as the unprivileged user, not nobody
Use travis as the unprivileged user, not nobody

The new Travis Trusty environment configures /home/travis with permissions
770, which means that if we run our unprivileged tests as nobody, they
cannot execute the test programs that were built under the /home/travis
directory.

Fix this by using travis as the unprivileged user so we don't have to
worry about permissions.

jmmv/kyua,jmmv/kyua,jmmv/kyua,jmmv/kyua