trivial: Do not use the local AppData files for the speed test
trivial: Do not use the local AppData files for the speed test

Doing so will make distcheck failed if broken files are installed.

hughsie/appstream-glib,hughsie/appstream-glib,mitya57/appstream-glib,superm1/appstream-glib,superm1/appstream-glib,mitya57/appstream-glib,ikeydoherty/appstream-glib,ximion/appstream-glib,hughsie/appstream-glib,kalev/appstream-glib,ximion/appstream-glib,ikeydoherty/appstream-glib,ximion/appstream-glib,kalev/appstream-glib