Don't call Makefile.top but just Makefile

Change-Id: I69e9c6fa946fb8f740b4e1af16a84e9b012b8558
Reviewed-on: http://review.couchbase.org/35185
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>