meson: Reformat glx code to match more common style

meson: Reformat glx code to match more common style

Generally in our meson build large arrays are formated in the form:
[
  ..., ..., ..., $
  ...,
]

So use that form

Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Jon Turney <jon.turney@dronecode.org.uk>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>