[nobuildbot] Remaining Win bots

Also renamed Win8 and Win10 to Win

BUG=skia:

Change-Id: If6439ba8108d9fec288223a5561230a1559dad44
Reviewed-on: https://skia-review.googlesource.com/5237
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Ben Wagner <benjaminwagner@google.com>