win,build: add creation of zip and 7z package

Add a step in vcbuild.bat to create a minimal package including node
and npm that can be used as an alternative to the MSI.

Compress the node.pdb file as zip and 7z.

All files are uploaded as part of build-release.

Reviewed-By: Joao Reis <reis@janeasystems.com>
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Alexis Campailla <orangemocha@nodejs.org>
PR-URL: https://github.com/nodejs/node/pull/5995
Fixes: https://github.com/nodejs/build/issues/299
Fixes: https://github.com/nodejs/node/issues/5696