Remove shared-library tags for these too.

[gnome.gobject-introspection] / gir / xfixes-4.0.gir

<?xml version="1.0"?>
<repository version="1.0"
            xmlns="http://www.gtk.org/introspection/core/1.0"
            xmlns:c="http://www.gtk.org/introspection/c/1.0">
  <namespace name="xfixes" version="4.0">
    <record name="XserverRegion" c:type="XserverRegion"/>
  </namespace>
</repository>