ANDROID: properly copy the scm_io_uring field in struct sk_buff

When moving the scm_io_uring field in struct sk_buff to preserve the
kernel ABI, the variable also needs to be properly copied to a new
sk_buff in the __copy_skb_header() function.

Bug: 259233216
Fixes: 5bb30ff6 ("ANDROID: fix up struct sk_buf ABI breakage")
Reported-by: Will Deacon <willdeacon@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I474ad43cc7de844281154d680c0557e769c10b22