MB-12361:bp: MB-10020 export ale:start_logger/3

Orig-Reviewed-on: http://review.couchbase.org/36667

This is trivial cherry-pick

Change-Id: Icc4054a04b6f226c4c32c7906082b1974036df76
Reviewed-on: http://review.couchbase.org/42177
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>