The newc format stores only 32-bit inode values. Assign unique
synthetic values from each full device and inode identity. This avoids
collisions after truncation while preserving hardlink groups.
Fixes#3314.
Exercise large inode values that collide after 32-bit truncation,
hardlink identity, and distinct device IDs. Update bsdcpio expectations
so successful synthesis produces no truncation warnings.
Darren Carreras