[Bug-cpio] Exit early after item found

[積丹尼 Dan Jacobson]

Perhaps when doing

$ cpio -i file.txt < x.cpio #or
$ cat x.cpio | cpio -di z/file.txt #whatever

once the file is found have cpio exit early,
instead of scanning the remainder of the file.
Or make this an option, as perhaps archives might contain multiple
identical entries.