um: fill the handlers array at build time

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h
index 598ca82..caa6661 100644
--- a/arch/um/include/shared/os.h
+++ b/arch/um/include/shared/os.h
@@ -225,7 +225,7 @@
 extern void timer_init(void);
 extern void set_sigstack(void *sig_stack, int size);
 extern void remove_sigstack(void);
-extern void set_handler(int sig, void (*handler)(int));
+extern void set_handler(int sig);
 extern int change_sig(int signal, int on);
 extern void block_signals(void);
 extern void unblock_signals(void);