bin/shortlog_mesa.sh: remove the final bashism

Remove the typeset built-in and toggle to /bin/sh

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Andreas Boll <andreas.boll.dev@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
1 file changed