Fix make distcheck failure found in GitLab CI job
Fix up intltool leaving .intltool-merge-cache.lock file behind.
Origin: https://gitlab.gnome.org/GNOME/gparted/-/merge_requests/103
Fix up intltool leaving .intltool-merge-cache.lock file behind.
Origin: https://gitlab.gnome.org/GNOME/gparted/-/merge_requests/103