win: backport bringing back xp/2k3 support

Issue: https://github.com/joyent/node/issues/25348
The gyp/project files don't explicitly specify a subsystem version,
which results in the default being used. The default changed from
VS 2010 to VS 2012 and later.

Backport 31220528, which itself
backports e8d08503 from io.js.
Original commit message follows:

  Chrome still runs on Windows XP, so there is no reason that iojs
  couldn't.

  PR: https://github.com/iojs/io.js/pull/512
  (cherry picked from commit e8d08503

)

Reviewed-By: Julien Gilli <julien.gilli@joyent.com>
  PR-URL: https://github.com/joyent/node/pull/25367



Conflicts:
	node.gyp

Reviewed-By: João Reis <reis@janeasystems.com>
PR-URL: https://github.com/joyent/node/pull/25569