Fix file descriptor leaks in pg_upgrade in failure code paths.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/d367d41d662c859011724745fec592baf94b70fe

Modified Files
--------------
contrib/pg_upgrade/check.c           |    8 ++++++--
contrib/pg_upgrade/file.c            |    6 ++++++
contrib/pg_upgrade/server.c          |    6 ++----
contrib/pg_upgrade/version.c         |    5 +++--
contrib/pg_upgrade/version_old_8_3.c |   26 +++++++++++++++++---------
5 files changed, 34 insertions(+), 17 deletions(-)

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