travis: apparently doing a run of 'cpuid' doesn't work

The build succeeds, but hangs when trying to execute:

https://travis-ci.org/tycho/cpuid/builds/6267464

Not sure what went wrong. Travis CI uses OpenVZ, and I've never tried CPUID on
OpenVZ before. I'd *assume* it just works, but this seems to show otherwise.

Signed-off-by: Steven Noonan <steven@uplinklabs.net>