CBD-1368:  blank space for 32-bit linux (3.0.0 and master)

Change-Id: I05cd9a8db15480eb22c48708368017f868d218d1
Reviewed-on: http://review.couchbase.org/36360
Tested-by: Philip Labee <philip@couchbase.com>
Reviewed-by: Philip Labee <philip@couchbase.com>