pgsql: Add uuid to the set of types supported by contrib/btree_gist.

Add uuid to the set of types supported by contrib/btree_gist.

Paul Jungwirth, reviewed and hacked on by Teodor Sigaev, Ildus
Kurbangaliev, Adam Brusselback, Chris Bandy, and myself.

Discussion: https://postgr.es/m/CA+renyUEE29=X01JXdz8_TQvo6n9=2XoEBBRnQ8rkLyr+kjPxQ@mail.gmail.com
Discussion: https://postgr.es/m/55F6EE82.8080209@sigaev.ru

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/11da83a0e70d32ed0e06a5c948cd8343f8ad5102

Modified Files
--------------
contrib/btree_gist/Makefile                 |   8 +-
contrib/btree_gist/btree_gist--1.2--1.3.sql |  65 +++
contrib/btree_gist/btree_gist.control       |   2 +-
contrib/btree_gist/btree_gist.h             |   3 +-
contrib/btree_gist/btree_uuid.c             | 238 ++++++++++
contrib/btree_gist/data/uuid.data           | 703 ++++++++++++++++++++++++++++
contrib/btree_gist/expected/uuid.out        |  66 +++
contrib/btree_gist/sql/uuid.sql             |  31 ++
doc/src/sgml/btree-gist.sgml                |   8 +-
src/backend/utils/adt/uuid.c                |   9 -
src/include/utils/uuid.h                    |   8 +-
11 files changed, 1120 insertions(+), 21 deletions(-)