Log Message:
Update textproc/libfastjson to 0.99.6.

0.99.6 2017-05-12
- fix a build issue under Solaris

0.99.5 2017-05-03
- fix tautology comparison in tautology in `fjson_object_iter_equal`
- made build under Solaris again
- made to build under AIX
- fix floating point representation when fractional part is missing
- m4: fix detection of atomics
- add fjson_object_dump() and fjson_object_write() functions