[archiso] Fix find cmd in _cleanup()

Fix FS#34075

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

archiso/mkarchiso

@@ -268,7 +268,7 @@ _cleanup () {
         find "${work_dir}/root-image/var/tmp" -mindepth 1 -delete
     fi
     # Delete package pacman related files.
-    find "${work_dir}" -name "*.pacnew" -name "*.pacsave" -name "*.pacorig" -delete
+    find "${work_dir}" \( -name "*.pacnew" -o -name "*.pacsave" -o -name "*.pacorig" \) -delete
     _msg_info "Done!"
 }