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_0_STABLE

Details
-------
http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=f887652dbd65d508b63b2205eb18d04d46b1b346

Modified Files
--------------
contrib/btree_gist/.gitignore | 2 ++
contrib/cube/.gitignore | 3 +++
contrib/dbase/.gitignore | 1 +
contrib/dblink/.gitignore | 2 ++
contrib/dbsize/.gitignore | 1 +
contrib/earthdistance/.gitignore | 2 ++
contrib/findoidjoins/.gitignore | 1 +
contrib/fulltextindex/.gitignore | 1 +
contrib/intagg/.gitignore | 1 +
contrib/intarray/.gitignore | 2 ++
contrib/isbn_issn/.gitignore | 1 +
contrib/ltree/.gitignore | 2 ++
contrib/miscutil/.gitignore | 1 +
contrib/noupdate/.gitignore | 1 +
contrib/pg_autovacuum/.gitignore | 2 ++
contrib/pg_dumplo/.gitignore | 1 +
contrib/pg_trgm/.gitignore | 2 ++
contrib/pgcrypto/.gitignore | 2 ++
contrib/rtree_gist/.gitignore | 3 +++
contrib/seg/.gitignore | 3 +++
contrib/string/.gitignore | 1 +
contrib/tablefunc/.gitignore | 2 ++
contrib/tsearch/.gitignore | 4 ++++
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 +++
37 files changed, 69 insertions(+), 9 deletions(-)