pgsql: In pg_upgrade, because toast table names can be mismatched with

In pg_upgrade, because toast table names can be mismatched with the heap
oid on 8.4, modify the toast name comparison test to only apply to old
9.0+ servers. (The test was previously 8.4+.)

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/2e9633c3620d4cbaa44ae61180f73137d0c63ccf

Modified Files
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contrib/pg_upgrade/info.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)