CBD-1425:  symlink to an actual grommit dir

Change-Id: I63fa1cde10cc571ce761a00e3252949e6e170d85
Reviewed-on: http://review.couchbase.org/40438
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>