build,win: restore vcbuild TAG functionality
Ref: https://github.com/nodejs/node/pull/17299 Ref: https://github.com/nodejs/abi-stable-node/issues/289
/cc @refack @digitalinfinity @mhdawson
Would someone mind testing this on a Windows machine please?
something like this (off the top of my head, I don't have a Windows machine to tinker with right at this moment):
set DISTTYPE=nightly
set DATESTRING=20180108
set COMMIT=abc123
vcbuild.bat build x64