replacing umlaute and fixing address in headers Haldeneggsteig -> Universitaetsstrasse

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

Implemented newlib __lock_* functions for Barrelfish.

Among other things this change enables proper locking for printf and co in
multithreaded programs.

Initial version of public stable barrelfish repository.