Add sun_path to the fake doc sockaddr_un

Author: cuviper

library/std/src/os/unix/net/addr.rs

@@ -15,7 +15,9 @@ mod libc {
 pubtypesocklen_t = u32;
 pubstructsockaddr;
 #[derive(Clone)]
-pubstructsockaddr_un;
+pubstructsockaddr_un{
+pubsun_path:[u8;1],
+}
 }
 
 constSUN_PATH_OFFSET:usize = mem::offset_of!(libc::sockaddr_un, sun_path);