pgsql: Preserve relfilenodes: Add support to pg_dump --binary-upgrade

Log Message:
-----------
Preserve relfilenodes:

Add support to pg_dump --binary-upgrade to preserve all relfilenodes,
for use by pg_migrator.

Modified Files:
--------------
pgsql/src/backend/catalog:
heap.c (r1.364 -> r1.365)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/heap.c?r1=1.364&r2=1.365)
index.c (r1.328 -> r1.329)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/index.c?r1=1.328&r2=1.329)
toasting.c (r1.26 -> r1.27)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/toasting.c?r1=1.26&r2=1.27)
pgsql/src/backend/commands:
cluster.c (r1.189 -> r1.190)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/cluster.c?r1=1.189&r2=1.190)
tablecmds.c (r1.313 -> r1.314)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tablecmds.c?r1=1.313&r2=1.314)
pgsql/src/backend/executor:
execMain.c (r1.339 -> r1.340)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execMain.c?r1=1.339&r2=1.340)
pgsql/src/backend/tcop:
utility.c (r1.327 -> r1.328)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/utility.c?r1=1.327&r2=1.328)
pgsql/src/bin/pg_dump:
pg_dump.c (r1.564 -> r1.565)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_dump.c?r1=1.564&r2=1.565)
pgsql/src/include/catalog:
toasting.h (r1.12 -> r1.13)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/toasting.h?r1=1.12&r2=1.13)