"fixed to remove redundantly contained files in a devel package."

The following files are also in json-glib-0.12.6-1PH.rpm.
/usr/share/doc/json-glib-0.12.6/AUTHORS
/usr/share/doc/json-glib-0.12.6/COPYING
/usr/share/doc/json-glib-0.12.6/NEWS
/usr/share/doc/json-glib-0.12.6/README