pgsql: In pg_upgrade, limit schema name filter to include toast tables.

In pg_upgrade, limit schema name filter to include toast tables. Bug
introduced recently when trying to filter out temp tables.

Backpatch to 9.0 and 9.1.

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/39a713ea059a8ad3d07e3ea4d2c9b5da1fe3fa25

Modified Files
--------------
contrib/pg_upgrade/info.c | 7 ++++---
contrib/pg_upgrade/version_old_8_3.c | 28 ++++++++++++++++------------
2 files changed, 20 insertions(+), 15 deletions(-)