pgsql: Fix pg_basebackup output to stdout on Windows.

Fix pg_basebackup output to stdout on Windows.

When writing a backup to stdout with pg_basebackup on Windows, put stdout
to binary mode. Any CR bytes in the output will otherwise be output
incorrectly as CR+LF.

In the passing, standardize on using "_setmode" instead of "setmode", for
the sake of consistency. They both do the same thing, but according to
MSDN documentation, setmode is deprecated.

Fixes bug #14634, reported by Henry Boehlert. Patch by Haribabu Kommi.
Backpatch to all supported versions.

Discussion: https://www.postgresql.org/message-id/20170428082818.24366.13134@wrigleys.postgresql.org

Branch
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REL9_6_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/cedd25ae8877cb7a465c3b42db7dab20873e162c

Modified Files
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src/bin/pg_basebackup/pg_basebackup.c | 4 ++++
src/bin/pg_dump/pg_backup_archiver.c | 4 ++--
2 files changed, 6 insertions(+), 2 deletions(-)