MB-100: fix broken build, missing kvshard file

Change-Id: I586a0b0ec01944c96168038e6c7514b65f6e126d
Reviewed-on: http://review.couchbase.org/26050
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: Bin Cui <bin.cui@gmail.com>