very difficult to get out of sync. add bootinfo.h and promlib.h
(using the same method) so that sparc64 headers can build sparc
stand (not yet finished.)
- MB_LEN_MAX is increased to 32.
- To ensure binary compatibility for old executables
under multibyte locale, versioned setlocale is added.
- __mb_len_cur definision is added in setlocale.c
and enable it in stdlib.h .
It is also important for multibyte locale stuffs,
but I just forgot.
