take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h

now it can be done...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 526deb3..91835e7 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -836,6 +836,16 @@
 		(const char __user *const __user *)envp)
 #endif
 
+asmlinkage long sys_fork(void);
+asmlinkage long sys_vfork(void);
+#ifdef CONFIG_CLONE_BACKWARDS
+asmlinkage long sys_clone(unsigned long, unsigned long, int __user *, int,
+	       int __user *);
+#else
+asmlinkage long sys_clone(unsigned long, unsigned long, int __user *,
+	       int __user *, int);
+#endif
+
 asmlinkage long sys_execve(const char __user *filename,
 		const char __user *const __user *argv,
 		const char __user *const __user *envp);