MB-12050: set C locale for cbcollect_info

Change-Id: Ib189822f56ea2dc52095d5e9535785cd1e9b562b
Reviewed-on: http://review.couchbase.org/41803
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Artem Stemkovski <artem@couchbase.com>