CBIT-532:  fix error in previous checkin (cd before mkdir)

Change-Id: I60fba961b42dca880fc7d0765286bda37f228ec2
Reviewed-on: http://review.couchbase.org/37777
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>