CBD-1249:  chmod +x smoke_test.sh

Change-Id: I3fd8fdfb6a8d9d7e98e04bed42fcef9552208681
Reviewed-on: http://review.couchbase.org/34027
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>