buildroot

cpio: new package

Adding the cpio archive utility for the target and host. Patches have
been pulled from ArchLinux and Gentoo to fix CVE issues and compile
issues.

[Thomas: remove host variant of the package, as discussed during the
review of earlier version.]

Signed-off-by: Clayton Shotwell <clayton.shotwell@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>