Lock platform project for building 3.0.2

Change-Id: I8ae1bc4912709f1c21d4ae7041042d26f93d033a
Reviewed-on: http://review.couchbase.org/43773
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>