Log Message:
Update ruby-json and ruby-json-pure package to 1.6.5.

2012-01-15 (1.6.5)
  * Vit Ondruch <v.ondruch@tiscali.cz> reported a bug that shows up when using
    optimisation under GCC 4.7. Thx to him, Bohuslav Kabrda
    <bkabrda@redhat.com> and Yui NARUSE <naruse@airemix.jp> for \ 
debugging and
    developing a patch fix.
2011-12-24 (1.6.4)
  * Patches that improve speed on JRuby contributed by Charles Oliver Nutter
    <headius@headius.com>.
  * Support object_class/array_class with duck typed hash/array.