pgsql: Some more gitignore cleanups: cover contrib and PL regression te

Some more gitignore cleanups: cover contrib and PL regression test outputs.

Also do some further work in the back branches, where quite a bit wasn't
covered by Magnus' original back-patch.

Branch
------
REL8_1_STABLE

Details
-------
http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=f02f7c4c93d58d9eab226c29ceea2df52f62b58e

Modified Files
--------------
contrib/btree_gist/.gitignore          |    2 ++
contrib/cube/.gitignore                |    3 +++
contrib/dbase/.gitignore               |    1 +
contrib/dblink/.gitignore              |    2 ++
contrib/earthdistance/.gitignore       |    2 ++
contrib/fulltextindex/.gitignore       |    1 +
contrib/intagg/.gitignore              |    1 +
contrib/intarray/.gitignore            |    2 ++
contrib/isbn_issn/.gitignore           |    1 +
contrib/ltree/.gitignore               |    2 ++
contrib/pg_trgm/.gitignore             |    2 ++
contrib/pgcrypto/.gitignore            |    2 ++
contrib/seg/.gitignore                 |    3 +++
contrib/tablefunc/.gitignore           |    2 ++
contrib/tsearch2/.gitignore            |    4 ++++
contrib/userlock/.gitignore            |    1 +
contrib/xml2/.gitignore                |    2 ++
src/backend/bootstrap/.gitignore       |    1 +
src/backend/parser/.gitignore          |    1 +
src/bin/ipcclean/.gitignore            |    1 +
src/include/parser/.gitignore          |    2 +-
src/interfaces/ecpg/ecpglib/.gitignore |    9 +--------
src/interfaces/libpq/.gitignore        |    4 ++++
src/pl/plperl/.gitignore               |    3 +++
src/pl/plpgsql/src/.gitignore          |    2 ++
src/pl/plpython/.gitignore             |    2 ++
src/pl/tcl/.gitignore                  |    2 ++
src/pl/tcl/modules/.gitignore          |    3 +++
28 files changed, 54 insertions(+), 9 deletions(-)