MB-11772: Install mcctl into bin/ directory

Change-Id: I712bea5b32479d0df5127d98c0cef27f0075072d
Reviewed-on: http://review.couchbase.org/40109
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>