[glib] Non-fast-forward update to branch bindung-unbind-fix

[Christoph Reiter <creiter src gnome org>]

The branch 'bindung-unbind-fix' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  62268c0... g_binding_unbind: make it introspectable; allow calling it 

Commits added to the branch:

  0319dac... g_binding_unbind: make it more introspection friendly; allo