glib/tests/fileutils: Add a reproducer for #1852
glib/tests/fileutils: Add a reproducer for #1852

This test passes on the glib-2-60 branch, and failed before
merging !1027.

Signed-off-by: Simon McVittie <0e1aea601907c1a85c2dc96e5ea37e23c58d2e9b@collabora.com>

endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib