bug#62404: --reflink=auto not falling back appropriately on older kernels

[Pádraig Brady]

Details at
https://github.com/termux/termux-packages/issues/15706#issuecomment-1481144831

But in summary, the new --reflink errno checking in coreutils 9.2
is not working appropriately on android 4.9 kernels at least.

cheers,
Pádraig