Use AU1D bundle updates

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Release olpc-au-configs 0.102-3

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
dextrose-updater: do not replace config file

This way, dextrose-updater repositories can be added in
OOB, without adding any complex logic to handle different
XO models, etc.

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Release dextrose-updater 5.10

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>