pgsql: PL/Python: Add result object str handler

PL/Python: Add result object str handler

This is intended so that say plpy.debug(rv) prints something useful for
debugging query execution results.

reviewed by Steve Singer

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/330ed4ac6c55294c62bfd975d6e1aafda274e096

Modified Files
--------------
doc/src/sgml/plpython.sgml | 11 +++++++++++
src/pl/plpython/expected/plpython_spi.out | 18 ++++++++++++++++++
src/pl/plpython/plpy_resultobject.c | 23 ++++++++++++++++++++++-
src/pl/plpython/sql/plpython_spi.sql | 10 ++++++++++
4 files changed, 61 insertions(+), 1 deletions(-)

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