core: Make sure autostart dir exists
core: Make sure autostart dir exists

Make sure autostart dir exists before attempting to write to it.

jku/rygel,Pelagicore/Media-Manager-Rygel-patched,Tarnyko/rygel,Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,jku/rygel,luisbg/rygel,Tarnyko/rygel,Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,GNOME/rygel