build: disable etnaviv for simple-dmabuf-drm by default

The etnaviv driver is marked as experimental and not built by default in mesa.
Disabling it by default in Weston makes it easier for users to build it (as
users likely won't have etnaviv enabled) and makes the release process simpler.

Signed-off-by: Simon Ser <contact@emersion.fr>
2 jobs for disable-etnaviv in 1 minute and 11 seconds (queued for 5 seconds)
latest
Status Job ID Name Coverage
  Container Prep
passed #419752
container_prep

00:00:18

 
  Build
passed #419753
build-native-meson

00:00:53