To update the glib snapshot, first clone a copy of the glib repo.

	$ git clone git://git.gnome.org/glib

Use the update-glib.sh script to grab a checkout from your local repo.

	$ ./glib-patches/update-glib.sh ../glib

If you've updated to a new glib version, add a new patch (or refresh
the current patches) in glib-patches, update the default tag value in
update-glib.sh and commit the changes.

The idea is that all changes are committed and you can build directly
from the pkg-config repo without manipulating the glib snapshot
anymore.
