(make -j4 || (make -j1 && false)

Change-Id: Ic1d376f4d96dff915d2a83db7a83f8a916065518
Reviewed-on: http://review.couchbase.org/33185
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Tested-by: Eric Limare <eric.limare@couchbase.com>