CBLT-255:  fix path to SRC/release directory

Change-Id: Ie1210c203f41c34bae97e669d6028ce98a2c69ac
Reviewed-on: http://review.couchbase.org/39745
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>