MB-9343 export cmd_quiet and cmd_vocal api's from mc_client_binary

Change-Id: I9b0494cad2b30118826d94f7e7095d5e871bab70
Reviewed-on: http://review.couchbase.org/30069
Tested-by: Artem Stemkovski <artem@couchbase.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>