* locale/loadlocale.c (_nl_load_locale) [MAP_FILE]: Define it zero
if undefined.
* string/strxfrm.c: Just copy the string (for now).
* string/strcoll.c: Just call strcmp (for now).
* mach/Makefile (lock): Add mutex-init.
* mach/mutex-solid.c (_cthread_mutex_lock_routine,
_cthread_mutex_unlock_routine): Variables removed.
(__mutex_lock_solid, __mutex_unlock_solid): Don't use them; just stub.
(__mutex_init): Function moved to new file mutex-init.c.
* mach/mutex-init.c: New file, broken out of mutex-solid.c.
