[klibc] klibc compilation breakage on 2.6.8+

[christophe varoqui]

hello,

klibc/include/signal.h include asm/signal.h which prefixes the
__sighandler_t definition with a __user annotation.

__user not being defined previously leads to a compilation breakage.

It's the only occurrence for now, so the following dirty work-around
works here :

add a "#define __user" at klibc/include/signal.h head.

regards,
-- 
christophe varoqui <christophe.varoqui at free.fr>