json-c: revert to 0.11

Will need to wait for the following upstream fixes to be released:
http://trac.osgeo.org/postgis/ticket/2723
http://trac.osgeo.org/gdal/ticket/5449

Closes #29430.
json-c: update 0.11 bottle.

Closes #29435.

Signed-off-by: Brett Koonce <koonce@gmail.com>