This way the user doesn't inadvertantly end up with information from a previous
run of Subsurface-mobile when they copy the logs to the clipboard.
Not sure we should do the same when building for desktop, so right now it's
only when building for a device.
Reported-by: Thomas Fänge <thomas.fange@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>