test: add buffer testcase for resetting kZeroFill

Test failed or zero-sized Buffer allocations not affecting subsequent
creations of typed arrays.

PR-URL: https://github.com/nodejs/node/pull/7093


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>