CBLT-39: Build package for sync gateway

Change-Id: I955cb9fcdac50e6d99dfa5d165c9d7eaefe029f3
Reviewed-on: http://review.couchbase.org/28851
Reviewed-by: Bin Cui <bin.cui@gmail.com>
Tested-by: Bin Cui <bin.cui@gmail.com>