build: run lint before tests

Have `make test` run linting tools before tests rather than after. Lint
is likely to find issues quickly. Tests may take a while to run. So do
the linting first.

Refs: https://github.com/nodejs/node/issues/4546#issuecomment-189755007
PR-URL: https://github.com/nodejs/node/pull/5470


Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>