test: add test-spawn-cmd-named-pipe

Adding a Windows test to verify that a node process spawned via
cmd with named pipes can access its stdio streams.

Ref: https://github.com/nodejs/node-v0.x-archive/issues/7345

PR-URL: https://github.com/nodejs/node/pull/2770


Reviewed-By: cjihrig - Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: thefourtheye - Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: evanlucas - Evan Lucas <evanlucas@me.com>