CBD-1239: use win2008-x86-30-builder-01 for master win-32 builds

Change-Id: If8ff9bdd6fd04a648906c2f12fa262d1c90822e3
Reviewed-on: http://review.couchbase.org/34407
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>