src/update_handler: expose pre-existing mount points to hooks
src/update_handler: expose pre-existing mount points to hooks

This is useful together with the allow-mounted slot option, to tell the
custom install hook where the device is mounted.

Signed-off-by: Rasmus Villemoes <4a950b3c050761f138a737fe02e762ea6e8a2378@prevas.dk>
Signed-off-by: Jan Luebbe <3a82f1ac4ad59607a20f180f1c67ac8ba31ad0d5@pengutronix.de>

jluebbe/rauc,ejoerns/rauc,rauc/rauc,jluebbe/rauc,rauc/rauc,rauc/rauc,ejoerns/rauc,jluebbe/rauc,ejoerns/rauc