For systemd (and our own sanity) we need to do the /usr merge. This fork
of apk-tools includes the logic to support alpine packages like tar
which install the main tar binary to /bin and then a symlink to
/usr/bin/...

We should find a way to implement this in upstream apk-tools, and
continue pushing Alpine to also adopt the merged /usr model.

Signed-off-by: Caleb Connolly <caleb@postmarketos.org>