Make use of LATERAL in information_schema.sequences view.

It said "XXX: The following could be improved if we had LATERAL" ...
so let's do that.

No catversion bump since either version of the view works fine.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/c246eb5aafe66d5537b468d6da2116c462775faf

Modified Files
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src/backend/catalog/information_schema.sql |   13 ++++++-------
1 files changed, 6 insertions(+), 7 deletions(-)

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Next:	From: Tom Lane	Date: 2012-08-19 18:12:51
	Subject: pgsql: Allow OLD and NEW in multi-row VALUES within rules.
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	Subject: pgsql: Another round of planner fixes for LATERAL.