CBD-774: Add support for automake 1.13

Change-Id: I604ebc8de0c53484f71d8a001785629d55193452
Reviewed-on: http://review.couchbase.org/23971
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>