MB-9561: Sync rel-3.0.0.xml with branch-master.xml

rel-3.0.0.xml tries to build the same source as branch-master.xml,
but did not contain the last changes in branch-master.xml.

This patch syncs the two files (copies branch-master.xml to
rel-3.0.0.xml to make it easier to diff the two files in the
future).

Change-Id: I9a1870ae195fa40485836fa4ed59aa5c5761e935
Reviewed-on: http://review.couchbase.org/30333
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>