Corrected issue causing prebuild 32-bit windows binaries not to load.

Change-Id: I18647250da749e5837ebfed8d5c9405933846ffb
Reviewed-on: http://review.couchbase.org/30191
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Brett Lawson <brett19@gmail.com>