test: introduce a test for process.versions output
test: introduce a test for process.versions output

make sure that process.versions contains an expected list of software to avoid
potential mistakes with refactoring.

PR-URL: https://github.com/iojs/io.js/pull/352
Reviewed-By: Rod Vagg <f9f03903429036ef609ed7ca822fddfa76155c29@vagg.org>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node