Fix missing 'OBS_LOGICALLY_DELETED'

Change-Id: I25e050ca48d52a843e2880be80f8fb76a3951485
Reviewed-on: http://review.couchbase.org/27398
Tested-by: Mordechai Nunberg <mnunberg@haskalah.org>
Reviewed-by: Volker Mische <volker.mische@gmail.com>