CBD-1386:  centos-6 x64 TOY builder

Change-Id: I00c2a84181b096d4f3752fe78cd9fba80eaecab5
Reviewed-on: http://review.couchbase.org/39425
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>