Update struct flock for _FILE_OFFSET_BITS=64

Author: snogge

src/unix/linux_like/linux/gnu/b32/mips/mod.rs

@@ -182,9 +182,7 @@ s! {
         pub l_whence: ::c_short,
         pub l_start: ::off_t,
         pub l_len: ::off_t,
-        pub l_sysid: ::c_long,
         pub l_pid: ::pid_t,
-        pad: [::c_long; 4],
     }
 }