CBD-853:  change commit revision to 4180bd2a09be9a2c62c22906afcfe119c64c5c93

Change-Id: I4a482cf7b29670ad8d4af3d2b36b6cbcbfb86a8f
Reviewed-on: http://review.couchbase.org/24846
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>