Added power support

[dthadi3]

Thanks for your code, Its working good. Added power support for the travis.yml file with ppc64le. This is part of the Ubuntu distribution for ppc64le. This helps us simplify testing later when distributions are re-building and re-releasing. For more info tag @gerrith3.

[marijnh]

I have never ran into a situation where a node.js program worked on one architecture but not on another, so at first glance, this looks like a waste of Travis CPU time. Can you elaborate on the motivation here?

[gerrith3]

@marijnh Actually, we have an automation test where we've tried to test about 100,000 npms, with initially about a 20-25% failure rate. It is hard to tell which ones will work and which won't without the testing. Most fail in the build or testing due to challenges in things like electron/phantomjs/chromedriver not installed by default, or packages which depend on older versions of npm (minor), etc. Explicit testing removes that question completely. BTW, many of the failures are reasonably easy to correct when we know about them.

[marijnh]

Fair enough, but no, I don't want to continue burning CI cycles for every patch in the off chance that this regresses in the future.