File _patchinfo of Package patchinfo

<patchinfo incident="858">
  <packager>dimstar</packager>
  <issue tracker="bnc" id="778436"></issue>
  <category>recommended</category>
  <rating>moderate</rating>
  <summary>gjs: fix spurious crashes in gnome-shell-extension-prefs</summary>
  <description>gnome-shell-extension-prefs is known to crash in for several extensions, as an invalid state can be reached.
</description>
</patchinfo>