`cp --preserve=links -R -H`  doesn't keep the inodes


```
rm -rf a b c
touch a
ln -s a b
mkdir c
./target/debug/coreutils cp --preserve=links -R -H a b c
a_inode=$(ls -i c/a|sed 's,c/.*,,')
b_inode=$(ls -i c/b|sed 's,c/.*,,')
echo "$a_inode" = "$b_inode"
```

a_inode & b_inode should be the same
they aren't with our implementation

GNU test: tests/cp/link-preserve.sh