autotools: Fix tags/cscope targets with autools

This was introduced with a95bb6f7 (clients: Support explicit
synchronization)

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Status Job ID Name Coverage
  Build
passed #197468
build-native-autotools

00:04:54

passed #197469
build-native-meson

00:02:15