wayland-egl: fail the symbol check if lib is missing

Based on a similar patch (in Mesa) by Eric Engestrom.

v2: Rebase on top of $NM patch
v3: Rebase

Reviewed-by: Eric Engestrom <eric@engestrom.ch> (v1)
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
1 file changed