[gparted] Non-fast-forward update to branch systemd-masking

[Mike Fleetwood <mfleetwo src gnome org>]

The branch 'systemd-masking' 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:

  d5ddf90... Don't try to mask nonsense Systemd \xe2\x97\x8f.service (#1
  0c45858... Only mask Systemd mounts on block devices (#129)
  cc3e801... Exclude snap /dev/loop file system image mounts (#129)

Commits added to the branch:

  fb741cb... Don't try to mask non-existent Systemd \xe2\x97\x8f.service