pgsql: Reindent json.c and jsonfuncs.c.

Reindent json.c and jsonfuncs.c.

This will help in preparation of clean patches for upcoming
json work.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/243ee266339bd4a049ff92e101010242169b7287

Modified Files
--------------
src/backend/utils/adt/json.c | 67 +++++++++++++++++++------------------
src/backend/utils/adt/jsonfuncs.c | 20 +++++------
2 files changed, 45 insertions(+), 42 deletions(-)

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