tools: enforce `throw new Error()` with lint rule

Add linting rule requiring `throw new Error()` over `throw Error()`.

PR-URL: https://github.com/nodejs/node/pull/3714


Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>