File _patchinfo of Package patchinfo.4309

<patchinfo incident="4309">
  <issue id="1021476" tracker="bnc">Fix crash when using page-down on GtkListBox</issue>
  <category>recommended</category>
  <rating>moderate</rating>
  <packager>mgorse</packager>
  <description>
The GTK3 library was updated to version 3.20.10, which brings many stability fixes.
</description>
  <summary>Recommended update for gtk3</summary>
</patchinfo>