win: improve parsing of SDK version
win: improve parsing of SDK version

This makes the parsing more robust and fixes the additional issue
related to USB Device Connectivity component.

Fixes: https://github.com/nodejs/node-gyp/issues/1466
PR-URL: https://github.com/nodejs/node-gyp/pull/1516
Reviewed-By: João Reis <5095b819f0ac7660978fa44706cfa411a9116ec5@janeasystems.com>
Reviewed-By: Refael Ackermann <0604a90ccdde7a0adfa2ff3857349859a7209740@gmail.com>
Reviewed-By: Richard Lau <8193d74c06330af7778ef55510160e4e561ed6a1@uk.ibm.com>

refack/node-gyp,TooTallNate/node-gyp,TooTallNate/node-gyp,refack/node-gyp,TooTallNate/node-gyp,refack/node-gyp,refack/node-gyp,TooTallNate/node-gyp,refack/node-gyp,TooTallNate/node-gyp