gitlab-ci: Add meson build job with glamor disabled

To prevent breakage with glamor disabled from creeping in again.

Reviewed-by: Adam Jackson <ajax@redhat.com>
4 jobs for gitlab-ci-meson-noglamor in 4 minutes and 20 seconds (queued for 1 second)
Status Job ID Name Coverage
  Docker Image
passed #1602415
debian-testing

00:00:31

 
  Build And Test
passed #1602416
autotools

00:03:48

passed #1602417
meson

00:01:44

passed #1602418
meson-noglamor

00:01:34