reset toy build manifest to mainstream 3.0

Change-Id: Ic7e6b3c5e0d05da43c3634cdfe08d14049fd08cf
Reviewed-on: http://review.couchbase.org/38596
Reviewed-by: Pavel Paulau <pavel.paulau@gmail.com>
Tested-by: Pavel Paulau <pavel.paulau@gmail.com>