Fix unnecessary usrmerge assumptions
On non-usrmerge systems (e.g., Debian), bash, mv, cp, cat, tail,
keyctl, and gzip live in /bin, not /usr/bin.
On usrmerge systems, /bin is a symlink to /usr/bin (or vice versa), so
this has no effect.
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>