test: fix flaky test-tls-socket-close

Add error listener to ignore `ECONNRESET`. Makes test reliable while it
still segfaults (as expected) on Node.js 7.7.3. It might not be possible
to eliminate the probable race causing `ECONNRESET` without also
eliminating the required segfault-inducing part of the test. (Or maybe
it's totally possible. If you figure it out, hey cool, submit a pull
request.)

PR-URL: https://github.com/nodejs/node/pull/13529
Fixes: https://github.com/nodejs/node/issues/13184


Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>