scripts/tags.sh: use -n to test archinclude

In bash, "! -z" is equivalent to "-n", which seems to be more intuitive.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
CC: Sam Ravnborg <sam@ravnborg.org>
Link: https://lore.kernel.org/r/20231229030654.17474-3-richard.weiyang@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>