Adapt configure.ac to the new users/groups

This patch does not affect anything. The logic to start the other daemons
(except for RAPI which is already implemented) under different users has
not been added and comes later on. If not specified at all it doesn't even
change behaviour at all.

Signed-off-by: René Nussbaumer <rn@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>