Update to glib2 2.80.0-1 is broken due to missing MOUNT_2_40

Description:

When upgrading to glib2 2.80.0-1 (gnome-unstable branch), many applications refuse to start and display this message:

/usr/lib/libmount.so.1: version `MOUNT_2_40' not found (required by /usr/lib/libgio-2.0.so.0)

Additional info:

• package version(s): 2.80.0-1 (gnome-unstable branch)
• config and/or log files:
• link to upstream bug report, if any:

Steps to reproduce:

Upgrade from 2.79.3-1 to 2.80.0-1