rpm: Fix cpio 32 bit overflow issues on 64 bit inode filesystems

When building on XFS filesystems, the resulting rpms can be corrupted
with the same inode number being used for multiple hardlinked files.
There are two fixes, one to stop rpm crashing when accessing a broken
binary rpm, the other to stop generating them in the first places. Full
descriptions in the patch headers.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>