system-handler: Don't leak path string
system-handler: Don't leak path string

Without &, ^ay dups the string.

handsome-feng/flatpak,flatpak/flatpak,flatpak/flatpak,handsome-feng/flatpak,GeorgesStavracas/flatpak,matthiasclasen/flatpak,flatpak/flatpak,matthiasclasen/flatpak,amigadave/flatpak,matthiasclasen/flatpak,handsome-feng/flatpak,handsome-feng/flatpak,GeorgesStavracas/flatpak,amigadave/flatpak,GeorgesStavracas/flatpak,flatpak/flatpak,flatpak/flatpak,amigadave/flatpak,amigadave/flatpak,matthiasclasen/flatpak,handsome-feng/flatpak,GeorgesStavracas/flatpak,matthiasclasen/flatpak,GeorgesStavracas/flatpak