Log Message:
Update ruby-json and ruby-json-pure package to 1.9.2.

2015-01-08 (1.8.2)
  * Some performance improvements by Vipul A M <vipulnsward@gmail.com>.
  * Fix by Jason R. Clark <jclark@newrelic.com> to avoid mutation of
    JSON.dump_default_options.
  * More tests by Michael Mac-Vicar <mmacvicar@gmail.com> and fixing
    space_before accessor in generator.
  * Performance on Jruby improvemed by Ben Browning <bbrownin@redhat.com>.
  * Some fixes to be compatible with the new Ruby 2.2 by Zachary Scott \ 
<e@zzak.io>
    and SHIBATA Hiroshi <hsbt@ruby-lang.org>.