Allocate the brigade containing the EOR bucket from the connection

pool, rather than the request pool, because the core output filter
may need to reference the brigade immediately after deleting the
EOR bucket (and thus the request pool).  This fixes a coredump
encountered when running t/TEST on an httpd compiled with
"--enable-pool-debug."


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@329484 13f79535-47bb-0310-9956-ffa450edef68