Always install binaries and other files under /usr, not /. This will
break any distribution that hasn't yet merged the two, which are
vanishingly small these days. This breaks the usecase of needing to
repair the /usr partition when there is no initramfs or livecd
available and / is the only option.
Signed-off-by: Chris Hofstaedtler <zeha@debian.org> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>