pgsql: Revert out: Update fsync test to match new O_DIRECT behavior.

Log Message:
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Revert out:

Update fsync test to match new O_DIRECT behavior.

Greg Smith

Modified Files:
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pgsql/src/tools/fsync:
test_fsync.c (r1.15 -> r1.16)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tools/fsync/test_fsync.c.diff?r1=1.15&r2=1.16)