Don't use recursive make

And drop the unused stuff from the Makefile

Change-Id: Ib6573d8edec357934875dfbf92099e10ffaf872f
Reviewed-on: http://review.couchbase.org/26926
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>