`test-fs-watch-recursive` and `test-fs-watch` were both watching the
same folder: `tmp/testsubdir` so running them sequentially on `OS X`
could make `test-fs-watch` to fail due to events generated in the other
test. Make them watch a random directory to fix the issue.
Fixes: https://github.com/nodejs/node/issues/8045
PR-URL: https://github.com/nodejs/node/pull/8115
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>